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Finding the Fourth Proportional to 642,832.98, 887,049.90 and 356,328.72

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Solution

The fourth proportional to 642,832.98, 887,049.90 and 356,328.72 is: 491,700.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,832.98 : 887,049.90 = 356,328.72 : x
  2. Step 2: Convert to fraction form
    642,832.98/887,049.90 = 356,328.72/x
  3. Step 3: Cross multiply
    642,832.98x = 887,049.90 × 356,328.72
  4. Step 4: Simplify right side
    642,832.98x = 316,081,355,443.13
  5. Step 5: Solve for x
    x = 316,081,355,443.13/642,832.98
  6. Step 6: Final answer
    x = 491,700.59

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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.