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Finding the Fourth Proportional to 1,157.55, 1,597.42 and 715.46

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Solution

The fourth proportional to 1,157.55, 1,597.42 and 715.46 is: 987.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.55 : 1,597.42 = 715.46 : x
  2. Step 2: Convert to fraction form
    1,157.55/1,597.42 = 715.46/x
  3. Step 3: Cross multiply
    1,157.55x = 1,597.42 × 715.46
  4. Step 4: Simplify right side
    1,157.55x = 1,142,890.11
  5. Step 5: Solve for x
    x = 1,142,890.11/1,157.55
  6. Step 6: Final answer
    x = 987.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.