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Finding the Fourth Proportional to 847.20, 1,271.04 and 500.84

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Solution

The fourth proportional to 847.20, 1,271.04 and 500.84 is: 751.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.20 : 1,271.04 = 500.84 : x
  2. Step 2: Convert to fraction form
    847.20/1,271.04 = 500.84/x
  3. Step 3: Cross multiply
    847.20x = 1,271.04 × 500.84
  4. Step 4: Simplify right side
    847.20x = 636,587.67
  5. Step 5: Solve for x
    x = 636,587.67/847.20
  6. Step 6: Final answer
    x = 751.40

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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.