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Finding the Fourth Proportional to 875.96, 1,312.06 and 547

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Solution

The fourth proportional to 875.96, 1,312.06 and 547 is: 819.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.96 : 1,312.06 = 547 : x
  2. Step 2: Convert to fraction form
    875.96/1,312.06 = 547/x
  3. Step 3: Cross multiply
    875.96x = 1,312.06 × 547
  4. Step 4: Simplify right side
    875.96x = 717,696.82
  5. Step 5: Solve for x
    x = 717,696.82/875.96
  6. Step 6: Final answer
    x = 819.33

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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.