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Finding the Fourth Proportional to 749.76, 1,035.08 and 470.34

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Solution

The fourth proportional to 749.76, 1,035.08 and 470.34 is: 649.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.76 : 1,035.08 = 470.34 : x
  2. Step 2: Convert to fraction form
    749.76/1,035.08 = 470.34/x
  3. Step 3: Cross multiply
    749.76x = 1,035.08 × 470.34
  4. Step 4: Simplify right side
    749.76x = 486,838.94
  5. Step 5: Solve for x
    x = 486,838.94/749.76
  6. Step 6: Final answer
    x = 649.33

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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.