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Finding the Fourth Proportional to 687.52, 948.76 and 372.77

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Solution

The fourth proportional to 687.52, 948.76 and 372.77 is: 514.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.52 : 948.76 = 372.77 : x
  2. Step 2: Convert to fraction form
    687.52/948.76 = 372.77/x
  3. Step 3: Cross multiply
    687.52x = 948.76 × 372.77
  4. Step 4: Simplify right side
    687.52x = 353,663.84
  5. Step 5: Solve for x
    x = 353,663.84/687.52
  6. Step 6: Final answer
    x = 514.41

Related Problems

Find fourth proportional to 343.76, 474.38 and 186.38
Half scale
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Double scale
Find fourth proportional to 688.52, 950.13 and 373.77
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.