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Finding the Fourth Proportional to 495,909.80, 745,419.90 and 486,578.60

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Solution

The fourth proportional to 495,909.80, 745,419.90 and 486,578.60 is: 731,393.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,909.80 : 745,419.90 = 486,578.60 : x
  2. Step 2: Convert to fraction form
    495,909.80/745,419.90 = 486,578.60/x
  3. Step 3: Cross multiply
    495,909.80x = 745,419.90 × 486,578.60
  4. Step 4: Simplify right side
    495,909.80x = 362,705,371,354.14
  5. Step 5: Solve for x
    x = 362,705,371,354.14/495,909.80
  6. Step 6: Final answer
    x = 731,393.84

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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.