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Finding the Fourth Proportional to 756.76, 1,045.01 and 477.49

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Solution

The fourth proportional to 756.76, 1,045.01 and 477.49 is: 659.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.76 : 1,045.01 = 477.49 : x
  2. Step 2: Convert to fraction form
    756.76/1,045.01 = 477.49/x
  3. Step 3: Cross multiply
    756.76x = 1,045.01 × 477.49
  4. Step 4: Simplify right side
    756.76x = 498,974.21
  5. Step 5: Solve for x
    x = 498,974.21/756.76
  6. Step 6: Final answer
    x = 659.36

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Find fourth proportional to 378.38, 522.50 and 238.74
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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.