Home / 1,470.85-2,206.12-921.36

Finding the Fourth Proportional to 1,470.85, 2,206.12 and 921.36

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Solution

The fourth proportional to 1,470.85, 2,206.12 and 921.36 is: 1,381.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.85 : 2,206.12 = 921.36 : x
  2. Step 2: Convert to fraction form
    1,470.85/2,206.12 = 921.36/x
  3. Step 3: Cross multiply
    1,470.85x = 2,206.12 × 921.36
  4. Step 4: Simplify right side
    1,470.85x = 2,032,630.72
  5. Step 5: Solve for x
    x = 2,032,630.72/1,470.85
  6. Step 6: Final answer
    x = 1,381.94

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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.