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Finding the Fourth Proportional to 278,006.80, 417,010.20 and 265,872.40

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Solution

The fourth proportional to 278,006.80, 417,010.20 and 265,872.40 is: 398,808.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,006.80 : 417,010.20 = 265,872.40 : x
  2. Step 2: Convert to fraction form
    278,006.80/417,010.20 = 265,872.40/x
  3. Step 3: Cross multiply
    278,006.80x = 417,010.20 × 265,872.40
  4. Step 4: Simplify right side
    278,006.80x = 110,871,502,698.48
  5. Step 5: Solve for x
    x = 110,871,502,698.48/278,006.80
  6. Step 6: Final answer
    x = 398,808.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.