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Finding the Fourth Proportional to 390,472.92, 538,880.04 and 220,708.26

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Solution

The fourth proportional to 390,472.92, 538,880.04 and 220,708.26 is: 304,592.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,472.92 : 538,880.04 = 220,708.26 : x
  2. Step 2: Convert to fraction form
    390,472.92/538,880.04 = 220,708.26/x
  3. Step 3: Cross multiply
    390,472.92x = 538,880.04 × 220,708.26
  4. Step 4: Simplify right side
    390,472.92x = 118,935,275,977.13
  5. Step 5: Solve for x
    x = 118,935,275,977.13/390,472.92
  6. Step 6: Final answer
    x = 304,592.89

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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.