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Finding the Fourth Proportional to 990,700.80, 1,486,051.20 and 359,635.20

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Solution

The fourth proportional to 990,700.80, 1,486,051.20 and 359,635.20 is: 539,452.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,700.80 : 1,486,051.20 = 359,635.20 : x
  2. Step 2: Convert to fraction form
    990,700.80/1,486,051.20 = 359,635.20/x
  3. Step 3: Cross multiply
    990,700.80x = 1,486,051.20 × 359,635.20
  4. Step 4: Simplify right side
    990,700.80x = 534,436,320,522.24
  5. Step 5: Solve for x
    x = 534,436,320,522.24/990,700.80
  6. Step 6: Final answer
    x = 539,452.80

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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.