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Finding the Fourth Proportional to 947.30, 1,417.91 and 507.45

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Solution

The fourth proportional to 947.30, 1,417.91 and 507.45 is: 759.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.30 : 1,417.91 = 507.45 : x
  2. Step 2: Convert to fraction form
    947.30/1,417.91 = 507.45/x
  3. Step 3: Cross multiply
    947.30x = 1,417.91 × 507.45
  4. Step 4: Simplify right side
    947.30x = 719,519.70
  5. Step 5: Solve for x
    x = 719,519.70/947.30
  6. Step 6: Final answer
    x = 759.55

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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.