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Finding the Fourth Proportional to 306,077.20, 459,115.80 and 128,784.40

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Solution

The fourth proportional to 306,077.20, 459,115.80 and 128,784.40 is: 193,176.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,077.20 : 459,115.80 = 128,784.40 : x
  2. Step 2: Convert to fraction form
    306,077.20/459,115.80 = 128,784.40/x
  3. Step 3: Cross multiply
    306,077.20x = 459,115.80 × 128,784.40
  4. Step 4: Simplify right side
    306,077.20x = 59,126,952,833.52
  5. Step 5: Solve for x
    x = 59,126,952,833.52/306,077.20
  6. Step 6: Final answer
    x = 193,176.60

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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.