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Finding the Fourth Proportional to 485,666.70, 670,643.02 and 304,689.74

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Solution

The fourth proportional to 485,666.70, 670,643.02 and 304,689.74 is: 420,737.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,666.70 : 670,643.02 = 304,689.74 : x
  2. Step 2: Convert to fraction form
    485,666.70/670,643.02 = 304,689.74/x
  3. Step 3: Cross multiply
    485,666.70x = 670,643.02 × 304,689.74
  4. Step 4: Simplify right side
    485,666.70x = 204,338,047,396.62
  5. Step 5: Solve for x
    x = 204,338,047,396.62/485,666.70
  6. Step 6: Final answer
    x = 420,737.20

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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.