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Finding the Fourth Proportional to 315,217.61, 472,775.66 and 90,526.94

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Solution

The fourth proportional to 315,217.61, 472,775.66 and 90,526.94 is: 135,775.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,217.61 : 472,775.66 = 90,526.94 : x
  2. Step 2: Convert to fraction form
    315,217.61/472,775.66 = 90,526.94/x
  3. Step 3: Cross multiply
    315,217.61x = 472,775.66 × 90,526.94
  4. Step 4: Simplify right side
    315,217.61x = 42,798,933,806.28
  5. Step 5: Solve for x
    x = 42,798,933,806.28/315,217.61
  6. Step 6: Final answer
    x = 135,775.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.