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Finding the Fourth Proportional to 876.84, 1,210.18 and 527.60

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Solution

The fourth proportional to 876.84, 1,210.18 and 527.60 is: 728.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.84 : 1,210.18 = 527.60 : x
  2. Step 2: Convert to fraction form
    876.84/1,210.18 = 527.60/x
  3. Step 3: Cross multiply
    876.84x = 1,210.18 × 527.60
  4. Step 4: Simplify right side
    876.84x = 638,490.97
  5. Step 5: Solve for x
    x = 638,490.97/876.84
  6. Step 6: Final answer
    x = 728.17

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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.