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Finding the Fourth Proportional to 1,023.86, 1,535.46 and 407.45

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Solution

The fourth proportional to 1,023.86, 1,535.46 and 407.45 is: 611.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,023.86 : 1,535.46 = 407.45 : x
  2. Step 2: Convert to fraction form
    1,023.86/1,535.46 = 407.45/x
  3. Step 3: Cross multiply
    1,023.86x = 1,535.46 × 407.45
  4. Step 4: Simplify right side
    1,023.86x = 625,623.18
  5. Step 5: Solve for x
    x = 625,623.18/1,023.86
  6. Step 6: Final answer
    x = 611.04

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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.