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Finding the Fourth Proportional to 278,895, 385,888.41 and 243,159.42

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Solution

The fourth proportional to 278,895, 385,888.41 and 243,159.42 is: 336,443.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,895 : 385,888.41 = 243,159.42 : x
  2. Step 2: Convert to fraction form
    278,895/385,888.41 = 243,159.42/x
  3. Step 3: Cross multiply
    278,895x = 385,888.41 × 243,159.42
  4. Step 4: Simplify right side
    278,895x = 93,832,401,960.32
  5. Step 5: Solve for x
    x = 93,832,401,960.32/278,895
  6. Step 6: Final answer
    x = 336,443.47

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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.