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Finding the Fourth Proportional to 258,957.80, 388,436.70 and 153,722.60

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Solution

The fourth proportional to 258,957.80, 388,436.70 and 153,722.60 is: 230,583.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,957.80 : 388,436.70 = 153,722.60 : x
  2. Step 2: Convert to fraction form
    258,957.80/388,436.70 = 153,722.60/x
  3. Step 3: Cross multiply
    258,957.80x = 388,436.70 × 153,722.60
  4. Step 4: Simplify right side
    258,957.80x = 59,711,499,459.42
  5. Step 5: Solve for x
    x = 59,711,499,459.42/258,957.80
  6. Step 6: Final answer
    x = 230,583.90

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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.