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Finding the Fourth Proportional to 407,870.12, 562,876.70 and 279,078.68

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Solution

The fourth proportional to 407,870.12, 562,876.70 and 279,078.68 is: 385,139.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,870.12 : 562,876.70 = 279,078.68 : x
  2. Step 2: Convert to fraction form
    407,870.12/562,876.70 = 279,078.68/x
  3. Step 3: Cross multiply
    407,870.12x = 562,876.70 × 279,078.68
  4. Step 4: Simplify right side
    407,870.12x = 157,086,882,228.98
  5. Step 5: Solve for x
    x = 157,086,882,228.98/407,870.12
  6. Step 6: Final answer
    x = 385,139.48

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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.