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Finding the Fourth Proportional to 386,506.20, 580,047.30 and 199,421.40

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Solution

The fourth proportional to 386,506.20, 580,047.30 and 199,421.40 is: 299,280.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,506.20 : 580,047.30 = 199,421.40 : x
  2. Step 2: Convert to fraction form
    386,506.20/580,047.30 = 199,421.40/x
  3. Step 3: Cross multiply
    386,506.20x = 580,047.30 × 199,421.40
  4. Step 4: Simplify right side
    386,506.20x = 115,673,844,632.22
  5. Step 5: Solve for x
    x = 115,673,844,632.22/386,506.20
  6. Step 6: Final answer
    x = 299,280.70

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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.