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Finding the Fourth Proportional to 748.84, 1,033.10 and 486.76

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Solution

The fourth proportional to 748.84, 1,033.10 and 486.76 is: 671.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    748.84 : 1,033.10 = 486.76 : x
  2. Step 2: Convert to fraction form
    748.84/1,033.10 = 486.76/x
  3. Step 3: Cross multiply
    748.84x = 1,033.10 × 486.76
  4. Step 4: Simplify right side
    748.84x = 502,871.76
  5. Step 5: Solve for x
    x = 502,871.76/748.84
  6. Step 6: Final answer
    x = 671.53

Related Problems

Find fourth proportional to 374.42, 516.55 and 243.38
Half scale
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Double scale
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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.