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Finding the Fourth Proportional to 259,077.20, 388,615.80 and 148,280.40

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Solution

The fourth proportional to 259,077.20, 388,615.80 and 148,280.40 is: 222,420.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,077.20 : 388,615.80 = 148,280.40 : x
  2. Step 2: Convert to fraction form
    259,077.20/388,615.80 = 148,280.40/x
  3. Step 3: Cross multiply
    259,077.20x = 388,615.80 × 148,280.40
  4. Step 4: Simplify right side
    259,077.20x = 57,624,106,270.32
  5. Step 5: Solve for x
    x = 57,624,106,270.32/259,077.20
  6. Step 6: Final answer
    x = 222,420.60

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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.