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Finding the Fourth Proportional to 868.47, 1,303.41 and 457.86

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Solution

The fourth proportional to 868.47, 1,303.41 and 457.86 is: 687.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.47 : 1,303.41 = 457.86 : x
  2. Step 2: Convert to fraction form
    868.47/1,303.41 = 457.86/x
  3. Step 3: Cross multiply
    868.47x = 1,303.41 × 457.86
  4. Step 4: Simplify right side
    868.47x = 596,779.30
  5. Step 5: Solve for x
    x = 596,779.30/868.47
  6. Step 6: Final answer
    x = 687.16

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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.