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Finding the Fourth Proportional to 1,260,363.60, 1,890,545.40 and 787,582.80

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Solution

The fourth proportional to 1,260,363.60, 1,890,545.40 and 787,582.80 is: 1,181,374.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260,363.60 : 1,890,545.40 = 787,582.80 : x
  2. Step 2: Convert to fraction form
    1,260,363.60/1,890,545.40 = 787,582.80/x
  3. Step 3: Cross multiply
    1,260,363.60x = 1,890,545.40 × 787,582.80
  4. Step 4: Simplify right side
    1,260,363.60x = 1,488,961,039,659.12
  5. Step 5: Solve for x
    x = 1,488,961,039,659.12/1,260,363.60
  6. Step 6: Final answer
    x = 1,181,374.20

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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.