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Finding the Fourth Proportional to 750.12, 1,123.40 and 632.45

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Solution

The fourth proportional to 750.12, 1,123.40 and 632.45 is: 947.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.12 : 1,123.40 = 632.45 : x
  2. Step 2: Convert to fraction form
    750.12/1,123.40 = 632.45/x
  3. Step 3: Cross multiply
    750.12x = 1,123.40 × 632.45
  4. Step 4: Simplify right side
    750.12x = 710,485.55
  5. Step 5: Solve for x
    x = 710,485.55/750.12
  6. Step 6: Final answer
    x = 947.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.