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Finding the Fourth Proportional to 645,468.66, 890,778.29 and 358,982.60

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Solution

The fourth proportional to 645,468.66, 890,778.29 and 358,982.60 is: 495,413.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,468.66 : 890,778.29 = 358,982.60 : x
  2. Step 2: Convert to fraction form
    645,468.66/890,778.29 = 358,982.60/x
  3. Step 3: Cross multiply
    645,468.66x = 890,778.29 × 358,982.60
  4. Step 4: Simplify right side
    645,468.66x = 319,773,900,318.95
  5. Step 5: Solve for x
    x = 319,773,900,318.95/645,468.66
  6. Step 6: Final answer
    x = 495,413.52

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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.