Home / 730,660.90-1,008,280.32-399,510.76

Finding the Fourth Proportional to 730,660.90, 1,008,280.32 and 399,510.76

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Solution

The fourth proportional to 730,660.90, 1,008,280.32 and 399,510.76 is: 551,307.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    730,660.90 : 1,008,280.32 = 399,510.76 : x
  2. Step 2: Convert to fraction form
    730,660.90/1,008,280.32 = 399,510.76/x
  3. Step 3: Cross multiply
    730,660.90x = 1,008,280.32 × 399,510.76
  4. Step 4: Simplify right side
    730,660.90x = 402,818,835,874.68
  5. Step 5: Solve for x
    x = 402,818,835,874.68/730,660.90
  6. Step 6: Final answer
    x = 551,307.51

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.