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Finding the Fourth Proportional to 402,019.70, 555,046.80 and 249,221.18

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Solution

The fourth proportional to 402,019.70, 555,046.80 and 249,221.18 is: 344,086.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,019.70 : 555,046.80 = 249,221.18 : x
  2. Step 2: Convert to fraction form
    402,019.70/555,046.80 = 249,221.18/x
  3. Step 3: Cross multiply
    402,019.70x = 555,046.80 × 249,221.18
  4. Step 4: Simplify right side
    402,019.70x = 138,329,418,451.22
  5. Step 5: Solve for x
    x = 138,329,418,451.22/402,019.70
  6. Step 6: Final answer
    x = 344,086.17

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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.