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Finding the Fourth Proportional to 1,437.88, 2,157.05 and 707.53

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Solution

The fourth proportional to 1,437.88, 2,157.05 and 707.53 is: 1,061.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,437.88 : 2,157.05 = 707.53 : x
  2. Step 2: Convert to fraction form
    1,437.88/2,157.05 = 707.53/x
  3. Step 3: Cross multiply
    1,437.88x = 2,157.05 × 707.53
  4. Step 4: Simplify right side
    1,437.88x = 1,526,173.96
  5. Step 5: Solve for x
    x = 1,526,173.96/1,437.88
  6. Step 6: Final answer
    x = 1,061.41

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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.