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Finding the Fourth Proportional to 914.04, 1,370.70 and 426.24

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Solution

The fourth proportional to 914.04, 1,370.70 and 426.24 is: 639.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.04 : 1,370.70 = 426.24 : x
  2. Step 2: Convert to fraction form
    914.04/1,370.70 = 426.24/x
  3. Step 3: Cross multiply
    914.04x = 1,370.70 × 426.24
  4. Step 4: Simplify right side
    914.04x = 584,247.17
  5. Step 5: Solve for x
    x = 584,247.17/914.04
  6. Step 6: Final answer
    x = 639.19

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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.