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Finding the Fourth Proportional to 285,526.80, 428,290.20 and 152,816.40

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Solution

The fourth proportional to 285,526.80, 428,290.20 and 152,816.40 is: 229,224.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,526.80 : 428,290.20 = 152,816.40 : x
  2. Step 2: Convert to fraction form
    285,526.80/428,290.20 = 152,816.40/x
  3. Step 3: Cross multiply
    285,526.80x = 428,290.20 × 152,816.40
  4. Step 4: Simplify right side
    285,526.80x = 65,449,766,519.28
  5. Step 5: Solve for x
    x = 65,449,766,519.28/285,526.80
  6. Step 6: Final answer
    x = 229,224.60

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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.