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Finding the Fourth Proportional to 900.84, 1,243.10 and 527.93

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Solution

The fourth proportional to 900.84, 1,243.10 and 527.93 is: 728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.84 : 1,243.10 = 527.93 : x
  2. Step 2: Convert to fraction form
    900.84/1,243.10 = 527.93/x
  3. Step 3: Cross multiply
    900.84x = 1,243.10 × 527.93
  4. Step 4: Simplify right side
    900.84x = 656,264.89
  5. Step 5: Solve for x
    x = 656,264.89/900.84
  6. Step 6: Final answer
    x = 728.50

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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.