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Finding the Fourth Proportional to 847,513.10, 1,270,605 and 398,002.62

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Solution

The fourth proportional to 847,513.10, 1,270,605 and 398,002.62 is: 596,691.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    847,513.10 : 1,270,605 = 398,002.62 : x
  2. Step 2: Convert to fraction form
    847,513.10/1,270,605 = 398,002.62/x
  3. Step 3: Cross multiply
    847,513.10x = 1,270,605 × 398,002.62
  4. Step 4: Simplify right side
    847,513.10x = 505,704,118,985.10
  5. Step 5: Solve for x
    x = 505,704,118,985.10/847,513.10
  6. Step 6: Final answer
    x = 596,691.80

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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.