Home / 398,827.80-550,585.35-307,979.82

Finding the Fourth Proportional to 398,827.80, 550,585.35 and 307,979.82

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Solution

The fourth proportional to 398,827.80, 550,585.35 and 307,979.82 is: 425,168.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,827.80 : 550,585.35 = 307,979.82 : x
  2. Step 2: Convert to fraction form
    398,827.80/550,585.35 = 307,979.82/x
  3. Step 3: Cross multiply
    398,827.80x = 550,585.35 × 307,979.82
  4. Step 4: Simplify right side
    398,827.80x = 169,569,176,987.64
  5. Step 5: Solve for x
    x = 169,569,176,987.64/398,827.80
  6. Step 6: Final answer
    x = 425,168.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.