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Finding the Fourth Proportional to 717,463.30, 990,106.05 and 395,174.58

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Solution

The fourth proportional to 717,463.30, 990,106.05 and 395,174.58 is: 545,344.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,463.30 : 990,106.05 = 395,174.58 : x
  2. Step 2: Convert to fraction form
    717,463.30/990,106.05 = 395,174.58/x
  3. Step 3: Cross multiply
    717,463.30x = 990,106.05 × 395,174.58
  4. Step 4: Simplify right side
    717,463.30x = 391,264,742,464.21
  5. Step 5: Solve for x
    x = 391,264,742,464.21/717,463.30
  6. Step 6: Final answer
    x = 545,344.61

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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.