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Finding the Fourth Proportional to 766.76, 1,058.12 and 417.44

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Solution

The fourth proportional to 766.76, 1,058.12 and 417.44 is: 576.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.76 : 1,058.12 = 417.44 : x
  2. Step 2: Convert to fraction form
    766.76/1,058.12 = 417.44/x
  3. Step 3: Cross multiply
    766.76x = 1,058.12 × 417.44
  4. Step 4: Simplify right side
    766.76x = 441,701.61
  5. Step 5: Solve for x
    x = 441,701.61/766.76
  6. Step 6: Final answer
    x = 576.06

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Find fourth proportional to 383.38, 529.06 and 208.72
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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.