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Finding the Fourth Proportional to 448,545.78, 619,042.50 and 276,428.88

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Solution

The fourth proportional to 448,545.78, 619,042.50 and 276,428.88 is: 381,502.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,545.78 : 619,042.50 = 276,428.88 : x
  2. Step 2: Convert to fraction form
    448,545.78/619,042.50 = 276,428.88/x
  3. Step 3: Cross multiply
    448,545.78x = 619,042.50 × 276,428.88
  4. Step 4: Simplify right side
    448,545.78x = 171,121,224,947.40
  5. Step 5: Solve for x
    x = 171,121,224,947.40/448,545.78
  6. Step 6: Final answer
    x = 381,502.25

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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.