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Finding the Fourth Proportional to 717,896.10, 990,703.17 and 395,617.76

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Solution

The fourth proportional to 717,896.10, 990,703.17 and 395,617.76 is: 545,956.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,896.10 : 990,703.17 = 395,617.76 : x
  2. Step 2: Convert to fraction form
    717,896.10/990,703.17 = 395,617.76/x
  3. Step 3: Cross multiply
    717,896.10x = 990,703.17 × 395,617.76
  4. Step 4: Simplify right side
    717,896.10x = 391,939,768,940.30
  5. Step 5: Solve for x
    x = 391,939,768,940.30/717,896.10
  6. Step 6: Final answer
    x = 545,956.12

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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.