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Finding the Fourth Proportional to 927.40, 1,393.98 and 603.88

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Solution

The fourth proportional to 927.40, 1,393.98 and 603.88 is: 907.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.40 : 1,393.98 = 603.88 : x
  2. Step 2: Convert to fraction form
    927.40/1,393.98 = 603.88/x
  3. Step 3: Cross multiply
    927.40x = 1,393.98 × 603.88
  4. Step 4: Simplify right side
    927.40x = 841,796.64
  5. Step 5: Solve for x
    x = 841,796.64/927.40
  6. Step 6: Final answer
    x = 907.70

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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.