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Finding the Fourth Proportional to 218,970.40, 328,585.20 and 144,306.40

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Solution

The fourth proportional to 218,970.40, 328,585.20 and 144,306.40 is: 216,545.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,970.40 : 328,585.20 = 144,306.40 : x
  2. Step 2: Convert to fraction form
    218,970.40/328,585.20 = 144,306.40/x
  3. Step 3: Cross multiply
    218,970.40x = 328,585.20 × 144,306.40
  4. Step 4: Simplify right side
    218,970.40x = 47,416,947,305.28
  5. Step 5: Solve for x
    x = 47,416,947,305.28/218,970.40
  6. Step 6: Final answer
    x = 216,545.01

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1.5x scale

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.