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Finding the Fourth Proportional to 1,158.72, 1,737 and 509.08

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Solution

The fourth proportional to 1,158.72, 1,737 and 509.08 is: 763.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.72 : 1,737 = 509.08 : x
  2. Step 2: Convert to fraction form
    1,158.72/1,737 = 509.08/x
  3. Step 3: Cross multiply
    1,158.72x = 1,737 × 509.08
  4. Step 4: Simplify right side
    1,158.72x = 884,271.96
  5. Step 5: Solve for x
    x = 884,271.96/1,158.72
  6. Step 6: Final answer
    x = 763.15

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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.