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Finding the Fourth Proportional to 478,993.74, 660,986.43 and 297,701.78

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Solution

The fourth proportional to 478,993.74, 660,986.43 and 297,701.78 is: 410,812.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,993.74 : 660,986.43 = 297,701.78 : x
  2. Step 2: Convert to fraction form
    478,993.74/660,986.43 = 297,701.78/x
  3. Step 3: Cross multiply
    478,993.74x = 660,986.43 × 297,701.78
  4. Step 4: Simplify right side
    478,993.74x = 196,776,833,461.91
  5. Step 5: Solve for x
    x = 196,776,833,461.91/478,993.74
  6. Step 6: Final answer
    x = 410,812.95

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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.