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Finding the Fourth Proportional to 740.16, 1,109.57 and 253.10

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Solution

The fourth proportional to 740.16, 1,109.57 and 253.10 is: 379.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.16 : 1,109.57 = 253.10 : x
  2. Step 2: Convert to fraction form
    740.16/1,109.57 = 253.10/x
  3. Step 3: Cross multiply
    740.16x = 1,109.57 × 253.10
  4. Step 4: Simplify right side
    740.16x = 280,832.17
  5. Step 5: Solve for x
    x = 280,832.17/740.16
  6. Step 6: Final answer
    x = 379.42

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1.5x scale

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.