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Finding the Fourth Proportional to 859,696.80, 1,289,466.06 and 291,012.90

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Solution

The fourth proportional to 859,696.80, 1,289,466.06 and 291,012.90 is: 436,492.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,696.80 : 1,289,466.06 = 291,012.90 : x
  2. Step 2: Convert to fraction form
    859,696.80/1,289,466.06 = 291,012.90/x
  3. Step 3: Cross multiply
    859,696.80x = 1,289,466.06 × 291,012.90
  4. Step 4: Simplify right side
    859,696.80x = 375,251,257,572.17
  5. Step 5: Solve for x
    x = 375,251,257,572.17/859,696.80
  6. Step 6: Final answer
    x = 436,492.56

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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.