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Finding the Fourth Proportional to 715,610.90, 987,526.49 and 388,916.24

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Solution

The fourth proportional to 715,610.90, 987,526.49 and 388,916.24 is: 536,695.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,610.90 : 987,526.49 = 388,916.24 : x
  2. Step 2: Convert to fraction form
    715,610.90/987,526.49 = 388,916.24/x
  3. Step 3: Cross multiply
    715,610.90x = 987,526.49 × 388,916.24
  4. Step 4: Simplify right side
    715,610.90x = 384,065,082,508.98
  5. Step 5: Solve for x
    x = 384,065,082,508.98/715,610.90
  6. Step 6: Final answer
    x = 536,695.40

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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.