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Finding the Fourth Proportional to 732.47, 1,009.90 and 483.40

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Solution

The fourth proportional to 732.47, 1,009.90 and 483.40 is: 666.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.47 : 1,009.90 = 483.40 : x
  2. Step 2: Convert to fraction form
    732.47/1,009.90 = 483.40/x
  3. Step 3: Cross multiply
    732.47x = 1,009.90 × 483.40
  4. Step 4: Simplify right side
    732.47x = 488,181.85
  5. Step 5: Solve for x
    x = 488,181.85/732.47
  6. Step 6: Final answer
    x = 666.49

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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.