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Finding the Fourth Proportional to 487,486.80, 731,230.20 and 436,165.20

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Solution

The fourth proportional to 487,486.80, 731,230.20 and 436,165.20 is: 654,247.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,486.80 : 731,230.20 = 436,165.20 : x
  2. Step 2: Convert to fraction form
    487,486.80/731,230.20 = 436,165.20/x
  3. Step 3: Cross multiply
    487,486.80x = 731,230.20 × 436,165.20
  4. Step 4: Simplify right side
    487,486.80x = 318,937,166,429.04
  5. Step 5: Solve for x
    x = 318,937,166,429.04/487,486.80
  6. Step 6: Final answer
    x = 654,247.80

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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.