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Finding the Fourth Proportional to 747.69, 1,032.26 and 486.20

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Solution

The fourth proportional to 747.69, 1,032.26 and 486.20 is: 671.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.69 : 1,032.26 = 486.20 : x
  2. Step 2: Convert to fraction form
    747.69/1,032.26 = 486.20/x
  3. Step 3: Cross multiply
    747.69x = 1,032.26 × 486.20
  4. Step 4: Simplify right side
    747.69x = 501,877.22
  5. Step 5: Solve for x
    x = 501,877.22/747.69
  6. Step 6: Final answer
    x = 671.24

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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.