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Finding the Fourth Proportional to 916.19, 1,372.50 and 607.13

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Solution

The fourth proportional to 916.19, 1,372.50 and 607.13 is: 909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.19 : 1,372.50 = 607.13 : x
  2. Step 2: Convert to fraction form
    916.19/1,372.50 = 607.13/x
  3. Step 3: Cross multiply
    916.19x = 1,372.50 × 607.13
  4. Step 4: Simplify right side
    916.19x = 833,279.06
  5. Step 5: Solve for x
    x = 833,279.06/916.19
  6. Step 6: Final answer
    x = 909.51

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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.