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Finding the Fourth Proportional to 290,549.92, 436,557.84 and 278,740.64

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Solution

The fourth proportional to 290,549.92, 436,557.84 and 278,740.64 is: 418,814.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,549.92 : 436,557.84 = 278,740.64 : x
  2. Step 2: Convert to fraction form
    290,549.92/436,557.84 = 278,740.64/x
  3. Step 3: Cross multiply
    290,549.92x = 436,557.84 × 278,740.64
  4. Step 4: Simplify right side
    290,549.92x = 121,686,411,718.62
  5. Step 5: Solve for x
    x = 121,686,411,718.62/290,549.92
  6. Step 6: Final answer
    x = 418,814.13

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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.