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Finding the Fourth Proportional to 1,787,713.30, 2,681,569.95 and 990,551.80

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Solution

The fourth proportional to 1,787,713.30, 2,681,569.95 and 990,551.80 is: 1,485,827.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787,713.30 : 2,681,569.95 = 990,551.80 : x
  2. Step 2: Convert to fraction form
    1,787,713.30/2,681,569.95 = 990,551.80/x
  3. Step 3: Cross multiply
    1,787,713.30x = 2,681,569.95 × 990,551.80
  4. Step 4: Simplify right side
    1,787,713.30x = 2,656,233,940,798.41
  5. Step 5: Solve for x
    x = 2,656,233,940,798.41/1,787,713.30
  6. Step 6: Final answer
    x = 1,485,827.70

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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.