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Finding the Fourth Proportional to 278,341.84, 418,003.80 and 207,283.78

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Solution

The fourth proportional to 278,341.84, 418,003.80 and 207,283.78 is: 311,291.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,341.84 : 418,003.80 = 207,283.78 : x
  2. Step 2: Convert to fraction form
    278,341.84/418,003.80 = 207,283.78/x
  3. Step 3: Cross multiply
    278,341.84x = 418,003.80 × 207,283.78
  4. Step 4: Simplify right side
    278,341.84x = 86,645,407,718.36
  5. Step 5: Solve for x
    x = 86,645,407,718.36/278,341.84
  6. Step 6: Final answer
    x = 311,291.35

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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.