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Finding the Fourth Proportional to 489,416.71, 675,684.62 and 308,283.90

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Solution

The fourth proportional to 489,416.71, 675,684.62 and 308,283.90 is: 425,614.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,416.71 : 675,684.62 = 308,283.90 : x
  2. Step 2: Convert to fraction form
    489,416.71/675,684.62 = 308,283.90/x
  3. Step 3: Cross multiply
    489,416.71x = 675,684.62 × 308,283.90
  4. Step 4: Simplify right side
    489,416.71x = 208,302,688,282.20
  5. Step 5: Solve for x
    x = 208,302,688,282.20/489,416.71
  6. Step 6: Final answer
    x = 425,614.17

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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.