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Finding the Fourth Proportional to 807,720.80, 1,209,248.40 and 492,792.80

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Solution

The fourth proportional to 807,720.80, 1,209,248.40 and 492,792.80 is: 737,765.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,720.80 : 1,209,248.40 = 492,792.80 : x
  2. Step 2: Convert to fraction form
    807,720.80/1,209,248.40 = 492,792.80/x
  3. Step 3: Cross multiply
    807,720.80x = 1,209,248.40 × 492,792.80
  4. Step 4: Simplify right side
    807,720.80x = 595,908,904,931.52
  5. Step 5: Solve for x
    x = 595,908,904,931.52/807,720.80
  6. Step 6: Final answer
    x = 737,765.95

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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.