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Finding the Fourth Proportional to 876.99, 1,210.31 and 503.97

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Solution

The fourth proportional to 876.99, 1,210.31 and 503.97 is: 695.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.99 : 1,210.31 = 503.97 : x
  2. Step 2: Convert to fraction form
    876.99/1,210.31 = 503.97/x
  3. Step 3: Cross multiply
    876.99x = 1,210.31 × 503.97
  4. Step 4: Simplify right side
    876.99x = 609,957.41
  5. Step 5: Solve for x
    x = 609,957.41/876.99
  6. Step 6: Final answer
    x = 695.51

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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.