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Finding the Fourth Proportional to 876.85, 1,315.36 and 465.98

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Solution

The fourth proportional to 876.85, 1,315.36 and 465.98 is: 699.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.85 : 1,315.36 = 465.98 : x
  2. Step 2: Convert to fraction form
    876.85/1,315.36 = 465.98/x
  3. Step 3: Cross multiply
    876.85x = 1,315.36 × 465.98
  4. Step 4: Simplify right side
    876.85x = 612,931.45
  5. Step 5: Solve for x
    x = 612,931.45/876.85
  6. Step 6: Final answer
    x = 699.02

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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.