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Finding the Fourth Proportional to 1,253.20, 1,729.17 and 714.76

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Solution

The fourth proportional to 1,253.20, 1,729.17 and 714.76 is: 986.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.20 : 1,729.17 = 714.76 : x
  2. Step 2: Convert to fraction form
    1,253.20/1,729.17 = 714.76/x
  3. Step 3: Cross multiply
    1,253.20x = 1,729.17 × 714.76
  4. Step 4: Simplify right side
    1,253.20x = 1,235,941.55
  5. Step 5: Solve for x
    x = 1,235,941.55/1,253.20
  6. Step 6: Final answer
    x = 986.23

Related Problems

Find fourth proportional to 626.60, 864.59 and 357.38
Half scale
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Double scale
Find fourth proportional to 1,254.20, 1,730.55 and 715.76
Similar ratio
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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.