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Finding the Fourth Proportional to 876.04, 1,312.86 and 485.46

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Solution

The fourth proportional to 876.04, 1,312.86 and 485.46 is: 727.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.04 : 1,312.86 = 485.46 : x
  2. Step 2: Convert to fraction form
    876.04/1,312.86 = 485.46/x
  3. Step 3: Cross multiply
    876.04x = 1,312.86 × 485.46
  4. Step 4: Simplify right side
    876.04x = 637,341.02
  5. Step 5: Solve for x
    x = 637,341.02/876.04
  6. Step 6: Final answer
    x = 727.53

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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.