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Finding the Fourth Proportional to 402,778.40, 555,695.76 and 249,761.60

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Solution

The fourth proportional to 402,778.40, 555,695.76 and 249,761.60 is: 344,585.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,778.40 : 555,695.76 = 249,761.60 : x
  2. Step 2: Convert to fraction form
    402,778.40/555,695.76 = 249,761.60/x
  3. Step 3: Cross multiply
    402,778.40x = 555,695.76 × 249,761.60
  4. Step 4: Simplify right side
    402,778.40x = 138,791,462,130.82
  5. Step 5: Solve for x
    x = 138,791,462,130.82/402,778.40
  6. Step 6: Final answer
    x = 344,585.17

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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.