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Finding the Fourth Proportional to 859,911, 1,290,384.90 and 299,339.16

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Solution

The fourth proportional to 859,911, 1,290,384.90 and 299,339.16 is: 449,189.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,911 : 1,290,384.90 = 299,339.16 : x
  2. Step 2: Convert to fraction form
    859,911/1,290,384.90 = 299,339.16/x
  3. Step 3: Cross multiply
    859,911x = 1,290,384.90 × 299,339.16
  4. Step 4: Simplify right side
    859,911x = 386,262,732,042.68
  5. Step 5: Solve for x
    x = 386,262,732,042.68/859,911
  6. Step 6: Final answer
    x = 449,189.20

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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.