Home / 420,979.64-580,972.98-257,585.03

Finding the Fourth Proportional to 420,979.64, 580,972.98 and 257,585.03

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Solution

The fourth proportional to 420,979.64, 580,972.98 and 257,585.03 is: 355,480.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,979.64 : 580,972.98 = 257,585.03 : x
  2. Step 2: Convert to fraction form
    420,979.64/580,972.98 = 257,585.03/x
  3. Step 3: Cross multiply
    420,979.64x = 580,972.98 × 257,585.03
  4. Step 4: Simplify right side
    420,979.64x = 149,649,938,289.70
  5. Step 5: Solve for x
    x = 149,649,938,289.70/420,979.64
  6. Step 6: Final answer
    x = 355,480.23

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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.