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Finding the Fourth Proportional to 925.88, 1,386.47 and 555.45

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Solution

The fourth proportional to 925.88, 1,386.47 and 555.45 is: 831.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.88 : 1,386.47 = 555.45 : x
  2. Step 2: Convert to fraction form
    925.88/1,386.47 = 555.45/x
  3. Step 3: Cross multiply
    925.88x = 1,386.47 × 555.45
  4. Step 4: Simplify right side
    925.88x = 770,111.98
  5. Step 5: Solve for x
    x = 770,111.98/925.88
  6. Step 6: Final answer
    x = 831.76

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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.