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Finding the Fourth Proportional to 740.16, 1,101.50 and 715.55

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Solution

The fourth proportional to 740.16, 1,101.50 and 715.55 is: 1,064.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.16 : 1,101.50 = 715.55 : x
  2. Step 2: Convert to fraction form
    740.16/1,101.50 = 715.55/x
  3. Step 3: Cross multiply
    740.16x = 1,101.50 × 715.55
  4. Step 4: Simplify right side
    740.16x = 788,169.24
  5. Step 5: Solve for x
    x = 788,169.24/740.16
  6. Step 6: Final answer
    x = 1,064.87

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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.