Home / 2,929.20-4,394.02-981.40

Finding the Fourth Proportional to 2,929.20, 4,394.02 and 981.40

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Solution

The fourth proportional to 2,929.20, 4,394.02 and 981.40 is: 1,472.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,929.20 : 4,394.02 = 981.40 : x
  2. Step 2: Convert to fraction form
    2,929.20/4,394.02 = 981.40/x
  3. Step 3: Cross multiply
    2,929.20x = 4,394.02 × 981.40
  4. Step 4: Simplify right side
    2,929.20x = 4,312,291.23
  5. Step 5: Solve for x
    x = 4,312,291.23/2,929.20
  6. Step 6: Final answer
    x = 1,472.17

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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.