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Finding the Fourth Proportional to 218,966.80, 328,223.40 and 118,915.60

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Solution

The fourth proportional to 218,966.80, 328,223.40 and 118,915.60 is: 178,250.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,966.80 : 328,223.40 = 118,915.60 : x
  2. Step 2: Convert to fraction form
    218,966.80/328,223.40 = 118,915.60/x
  3. Step 3: Cross multiply
    218,966.80x = 328,223.40 × 118,915.60
  4. Step 4: Simplify right side
    218,966.80x = 39,030,882,545.04
  5. Step 5: Solve for x
    x = 39,030,882,545.04/218,966.80
  6. Step 6: Final answer
    x = 178,250.23

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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.