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Finding the Fourth Proportional to 875.06, 1,312.05 and 528.18

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Solution

The fourth proportional to 875.06, 1,312.05 and 528.18 is: 791.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.06 : 1,312.05 = 528.18 : x
  2. Step 2: Convert to fraction form
    875.06/1,312.05 = 528.18/x
  3. Step 3: Cross multiply
    875.06x = 1,312.05 × 528.18
  4. Step 4: Simplify right side
    875.06x = 692,998.57
  5. Step 5: Solve for x
    x = 692,998.57/875.06
  6. Step 6: Final answer
    x = 791.94

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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.