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Finding the Fourth Proportional to 659,155.15, 909,658.60 and 372,658.15

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Solution

The fourth proportional to 659,155.15, 909,658.60 and 372,658.15 is: 514,282.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,155.15 : 909,658.60 = 372,658.15 : x
  2. Step 2: Convert to fraction form
    659,155.15/909,658.60 = 372,658.15/x
  3. Step 3: Cross multiply
    659,155.15x = 909,658.60 × 372,658.15
  4. Step 4: Simplify right side
    659,155.15x = 338,991,693,309.22
  5. Step 5: Solve for x
    x = 338,991,693,309.22/659,155.15
  6. Step 6: Final answer
    x = 514,282.10

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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.