Home / 738,919.28-1,019,708.76-399,386.48

Finding the Fourth Proportional to 738,919.28, 1,019,708.76 and 399,386.48

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Solution

The fourth proportional to 738,919.28, 1,019,708.76 and 399,386.48 is: 551,153.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,919.28 : 1,019,708.76 = 399,386.48 : x
  2. Step 2: Convert to fraction form
    738,919.28/1,019,708.76 = 399,386.48/x
  3. Step 3: Cross multiply
    738,919.28x = 1,019,708.76 × 399,386.48
  4. Step 4: Simplify right side
    738,919.28x = 407,257,892,281.57
  5. Step 5: Solve for x
    x = 407,257,892,281.57/738,919.28
  6. Step 6: Final answer
    x = 551,153.43

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Double scale
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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.