Home / 917,920.60-1,376,024.88-310,286.16

Finding the Fourth Proportional to 917,920.60, 1,376,024.88 and 310,286.16

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Solution

The fourth proportional to 917,920.60, 1,376,024.88 and 310,286.16 is: 465,139.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,920.60 : 1,376,024.88 = 310,286.16 : x
  2. Step 2: Convert to fraction form
    917,920.60/1,376,024.88 = 310,286.16/x
  3. Step 3: Cross multiply
    917,920.60x = 1,376,024.88 × 310,286.16
  4. Step 4: Simplify right side
    917,920.60x = 426,961,476,079.66
  5. Step 5: Solve for x
    x = 426,961,476,079.66/917,920.60
  6. Step 6: Final answer
    x = 465,139.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.