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Finding the Fourth Proportional to 707.95, 1,061.96 and 317.53

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Solution

The fourth proportional to 707.95, 1,061.96 and 317.53 is: 476.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.95 : 1,061.96 = 317.53 : x
  2. Step 2: Convert to fraction form
    707.95/1,061.96 = 317.53/x
  3. Step 3: Cross multiply
    707.95x = 1,061.96 × 317.53
  4. Step 4: Simplify right side
    707.95x = 337,199.92
  5. Step 5: Solve for x
    x = 337,199.92/707.95
  6. Step 6: Final answer
    x = 476.31

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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.