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Finding the Fourth Proportional to 402,718.38, 555,737.14 and 221,429.04

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Solution

The fourth proportional to 402,718.38, 555,737.14 and 221,429.04 is: 305,564.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,718.38 : 555,737.14 = 221,429.04 : x
  2. Step 2: Convert to fraction form
    402,718.38/555,737.14 = 221,429.04/x
  3. Step 3: Cross multiply
    402,718.38x = 555,737.14 × 221,429.04
  4. Step 4: Simplify right side
    402,718.38x = 123,056,341,402.55
  5. Step 5: Solve for x
    x = 123,056,341,402.55/402,718.38
  6. Step 6: Final answer
    x = 305,564.25

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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.