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Finding the Fourth Proportional to 462,139.20, 693,208.80 and 146,620.80

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Solution

The fourth proportional to 462,139.20, 693,208.80 and 146,620.80 is: 219,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    462,139.20 : 693,208.80 = 146,620.80 : x
  2. Step 2: Convert to fraction form
    462,139.20/693,208.80 = 146,620.80/x
  3. Step 3: Cross multiply
    462,139.20x = 693,208.80 × 146,620.80
  4. Step 4: Simplify right side
    462,139.20x = 101,638,828,823.04
  5. Step 5: Solve for x
    x = 101,638,828,823.04/462,139.20
  6. Step 6: Final answer
    x = 219,931.20

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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.