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Finding the Fourth Proportional to 767.60, 1,059.12 and 472.76

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Solution

The fourth proportional to 767.60, 1,059.12 and 472.76 is: 652.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.60 : 1,059.12 = 472.76 : x
  2. Step 2: Convert to fraction form
    767.60/1,059.12 = 472.76/x
  3. Step 3: Cross multiply
    767.60x = 1,059.12 × 472.76
  4. Step 4: Simplify right side
    767.60x = 500,709.57
  5. Step 5: Solve for x
    x = 500,709.57/767.60
  6. Step 6: Final answer
    x = 652.31

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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.