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Finding the Fourth Proportional to 551,080.07, 760,490.10 and 309,363.11

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Solution

The fourth proportional to 551,080.07, 760,490.10 and 309,363.11 is: 426,920.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,080.07 : 760,490.10 = 309,363.11 : x
  2. Step 2: Convert to fraction form
    551,080.07/760,490.10 = 309,363.11/x
  3. Step 3: Cross multiply
    551,080.07x = 760,490.10 × 309,363.11
  4. Step 4: Simplify right side
    551,080.07x = 235,267,578,657.76
  5. Step 5: Solve for x
    x = 235,267,578,657.76/551,080.07
  6. Step 6: Final answer
    x = 426,920.87

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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.