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Finding the Fourth Proportional to 877.35, 1,210.62 and 499.29

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Solution

The fourth proportional to 877.35, 1,210.62 and 499.29 is: 688.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.35 : 1,210.62 = 499.29 : x
  2. Step 2: Convert to fraction form
    877.35/1,210.62 = 499.29/x
  3. Step 3: Cross multiply
    877.35x = 1,210.62 × 499.29
  4. Step 4: Simplify right side
    877.35x = 604,450.46
  5. Step 5: Solve for x
    x = 604,450.46/877.35
  6. Step 6: Final answer
    x = 688.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.