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Finding the Fourth Proportional to 734.76, 1,013.40 and 472.80

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Solution

The fourth proportional to 734.76, 1,013.40 and 472.80 is: 652.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.76 : 1,013.40 = 472.80 : x
  2. Step 2: Convert to fraction form
    734.76/1,013.40 = 472.80/x
  3. Step 3: Cross multiply
    734.76x = 1,013.40 × 472.80
  4. Step 4: Simplify right side
    734.76x = 479,135.52
  5. Step 5: Solve for x
    x = 479,135.52/734.76
  6. Step 6: Final answer
    x = 652.10

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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.