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Finding the Fourth Proportional to 420,044.78, 579,673.19 and 256,727.72

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Solution

The fourth proportional to 420,044.78, 579,673.19 and 256,727.72 is: 354,291.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,044.78 : 579,673.19 = 256,727.72 : x
  2. Step 2: Convert to fraction form
    420,044.78/579,673.19 = 256,727.72/x
  3. Step 3: Cross multiply
    420,044.78x = 579,673.19 × 256,727.72
  4. Step 4: Simplify right side
    420,044.78x = 148,818,176,413.83
  5. Step 5: Solve for x
    x = 148,818,176,413.83/420,044.78
  6. Step 6: Final answer
    x = 354,291.22

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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.