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Finding the Fourth Proportional to 715.56, 1,068.42 and 585.42

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Solution

The fourth proportional to 715.56, 1,068.42 and 585.42 is: 874.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.56 : 1,068.42 = 585.42 : x
  2. Step 2: Convert to fraction form
    715.56/1,068.42 = 585.42/x
  3. Step 3: Cross multiply
    715.56x = 1,068.42 × 585.42
  4. Step 4: Simplify right side
    715.56x = 625,474.44
  5. Step 5: Solve for x
    x = 625,474.44/715.56
  6. Step 6: Final answer
    x = 874.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.