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Finding the Fourth Proportional to 1,113.47, 1,670.22 and 291.83

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Solution

The fourth proportional to 1,113.47, 1,670.22 and 291.83 is: 437.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.47 : 1,670.22 = 291.83 : x
  2. Step 2: Convert to fraction form
    1,113.47/1,670.22 = 291.83/x
  3. Step 3: Cross multiply
    1,113.47x = 1,670.22 × 291.83
  4. Step 4: Simplify right side
    1,113.47x = 487,416.65
  5. Step 5: Solve for x
    x = 487,416.65/1,113.47
  6. Step 6: Final answer
    x = 437.75

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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.