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Finding the Fourth Proportional to 907.64, 1,359.42 and 555.30

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Solution

The fourth proportional to 907.64, 1,359.42 and 555.30 is: 831.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.64 : 1,359.42 = 555.30 : x
  2. Step 2: Convert to fraction form
    907.64/1,359.42 = 555.30/x
  3. Step 3: Cross multiply
    907.64x = 1,359.42 × 555.30
  4. Step 4: Simplify right side
    907.64x = 754,885.93
  5. Step 5: Solve for x
    x = 754,885.93/907.64
  6. Step 6: Final answer
    x = 831.70

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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.