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Finding the Fourth Proportional to 1,277.96, 1,763.55 and 710.76

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Solution

The fourth proportional to 1,277.96, 1,763.55 and 710.76 is: 980.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.96 : 1,763.55 = 710.76 : x
  2. Step 2: Convert to fraction form
    1,277.96/1,763.55 = 710.76/x
  3. Step 3: Cross multiply
    1,277.96x = 1,763.55 × 710.76
  4. Step 4: Simplify right side
    1,277.96x = 1,253,460.80
  5. Step 5: Solve for x
    x = 1,253,460.80/1,277.96
  6. Step 6: Final answer
    x = 980.83

Related Problems

Find fourth proportional to 638.98, 881.78 and 355.38
Half scale
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Double scale
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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.