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Finding the Fourth Proportional to 665,861.16, 918,285.15 and 436,335.08

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Solution

The fourth proportional to 665,861.16, 918,285.15 and 436,335.08 is: 601,747.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,861.16 : 918,285.15 = 436,335.08 : x
  2. Step 2: Convert to fraction form
    665,861.16/918,285.15 = 436,335.08/x
  3. Step 3: Cross multiply
    665,861.16x = 918,285.15 × 436,335.08
  4. Step 4: Simplify right side
    665,861.16x = 400,680,024,876.46
  5. Step 5: Solve for x
    x = 400,680,024,876.46/665,861.16
  6. Step 6: Final answer
    x = 601,747.10

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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.