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Finding the Fourth Proportional to 519,639.80, 779,569.05 and 164,689.70

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Solution

The fourth proportional to 519,639.80, 779,569.05 and 164,689.70 is: 247,069.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,639.80 : 779,569.05 = 164,689.70 : x
  2. Step 2: Convert to fraction form
    519,639.80/779,569.05 = 164,689.70/x
  3. Step 3: Cross multiply
    519,639.80x = 779,569.05 × 164,689.70
  4. Step 4: Simplify right side
    519,639.80x = 128,386,992,973.79
  5. Step 5: Solve for x
    x = 128,386,992,973.79/519,639.80
  6. Step 6: Final answer
    x = 247,069.21

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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.