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Finding the Fourth Proportional to 841.88, 1,263.36 and 457.04

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Solution

The fourth proportional to 841.88, 1,263.36 and 457.04 is: 685.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.88 : 1,263.36 = 457.04 : x
  2. Step 2: Convert to fraction form
    841.88/1,263.36 = 457.04/x
  3. Step 3: Cross multiply
    841.88x = 1,263.36 × 457.04
  4. Step 4: Simplify right side
    841.88x = 577,406.05
  5. Step 5: Solve for x
    x = 577,406.05/841.88
  6. Step 6: Final answer
    x = 685.85

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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.