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Finding the Fourth Proportional to 642,783.92, 887,048.36 and 356,308.88

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Solution

The fourth proportional to 642,783.92, 887,048.36 and 356,308.88 is: 491,709.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,783.92 : 887,048.36 = 356,308.88 : x
  2. Step 2: Convert to fraction form
    642,783.92/887,048.36 = 356,308.88/x
  3. Step 3: Cross multiply
    642,783.92x = 887,048.36 × 356,308.88
  4. Step 4: Simplify right side
    642,783.92x = 316,063,207,657.44
  5. Step 5: Solve for x
    x = 316,063,207,657.44/642,783.92
  6. Step 6: Final answer
    x = 491,709.89

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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.