Home / 420,042.78-579,670.43-256,725.72

Finding the Fourth Proportional to 420,042.78, 579,670.43 and 256,725.72

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Solution

The fourth proportional to 420,042.78, 579,670.43 and 256,725.72 is: 354,288.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,042.78 : 579,670.43 = 256,725.72 : x
  2. Step 2: Convert to fraction form
    420,042.78/579,670.43 = 256,725.72/x
  3. Step 3: Cross multiply
    420,042.78x = 579,670.43 × 256,725.72
  4. Step 4: Simplify right side
    420,042.78x = 148,816,307,220.83
  5. Step 5: Solve for x
    x = 148,816,307,220.83/420,042.78
  6. Step 6: Final answer
    x = 354,288.45

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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.