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Finding the Fourth Proportional to 859,857.59, 1,289,969.76 and 291,218.80

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Solution

The fourth proportional to 859,857.59, 1,289,969.76 and 291,218.80 is: 436,890.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,857.59 : 1,289,969.76 = 291,218.80 : x
  2. Step 2: Convert to fraction form
    859,857.59/1,289,969.76 = 291,218.80/x
  3. Step 3: Cross multiply
    859,857.59x = 1,289,969.76 × 291,218.80
  4. Step 4: Simplify right side
    859,857.59x = 375,663,445,543.49
  5. Step 5: Solve for x
    x = 375,663,445,543.49/859,857.59
  6. Step 6: Final answer
    x = 436,890.31

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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.