Home / 715,598.20-987,531.66-393,315.79

Finding the Fourth Proportional to 715,598.20, 987,531.66 and 393,315.79

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Solution

The fourth proportional to 715,598.20, 987,531.66 and 393,315.79 is: 542,779.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,598.20 : 987,531.66 = 393,315.79 : x
  2. Step 2: Convert to fraction form
    715,598.20/987,531.66 = 393,315.79/x
  3. Step 3: Cross multiply
    715,598.20x = 987,531.66 × 393,315.79
  4. Step 4: Simplify right side
    715,598.20x = 388,411,795,002.91
  5. Step 5: Solve for x
    x = 388,411,795,002.91/715,598.20
  6. Step 6: Final answer
    x = 542,779.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.