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Finding the Fourth Proportional to 1,130.82, 1,560.40 and 658.79

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Solution

The fourth proportional to 1,130.82, 1,560.40 and 658.79 is: 909.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.82 : 1,560.40 = 658.79 : x
  2. Step 2: Convert to fraction form
    1,130.82/1,560.40 = 658.79/x
  3. Step 3: Cross multiply
    1,130.82x = 1,560.40 × 658.79
  4. Step 4: Simplify right side
    1,130.82x = 1,027,981.10
  5. Step 5: Solve for x
    x = 1,027,981.10/1,130.82
  6. Step 6: Final answer
    x = 909.06

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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.