Home / 642,019.28-885,748.68-415,789.52

Finding the Fourth Proportional to 642,019.28, 885,748.68 and 415,789.52

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Solution

The fourth proportional to 642,019.28, 885,748.68 and 415,789.52 is: 573,635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,019.28 : 885,748.68 = 415,789.52 : x
  2. Step 2: Convert to fraction form
    642,019.28/885,748.68 = 415,789.52/x
  3. Step 3: Cross multiply
    642,019.28x = 885,748.68 × 415,789.52
  4. Step 4: Simplify right side
    642,019.28x = 368,285,018,497.83
  5. Step 5: Solve for x
    x = 368,285,018,497.83/642,019.28
  6. Step 6: Final answer
    x = 573,635.45

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Double scale
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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.