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Finding the Fourth Proportional to 218,740.80, 328,111.20 and 217,358.40

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Solution

The fourth proportional to 218,740.80, 328,111.20 and 217,358.40 is: 326,037.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,740.80 : 328,111.20 = 217,358.40 : x
  2. Step 2: Convert to fraction form
    218,740.80/328,111.20 = 217,358.40/x
  3. Step 3: Cross multiply
    218,740.80x = 328,111.20 × 217,358.40
  4. Step 4: Simplify right side
    218,740.80x = 71,317,725,454.08
  5. Step 5: Solve for x
    x = 71,317,725,454.08/218,740.80
  6. Step 6: Final answer
    x = 326,037.60

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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.