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Finding the Fourth Proportional to 492,078.90, 738,118.35 and 487,931.70

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Solution

The fourth proportional to 492,078.90, 738,118.35 and 487,931.70 is: 731,897.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,078.90 : 738,118.35 = 487,931.70 : x
  2. Step 2: Convert to fraction form
    492,078.90/738,118.35 = 487,931.70/x
  3. Step 3: Cross multiply
    492,078.90x = 738,118.35 × 487,931.70
  4. Step 4: Simplify right side
    492,078.90x = 360,151,341,316.70
  5. Step 5: Solve for x
    x = 360,151,341,316.70/492,078.90
  6. Step 6: Final answer
    x = 731,897.55

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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.