Home / 1,387,019.14-1,913,545.74-870,471.60

Finding the Fourth Proportional to 1,387,019.14, 1,913,545.74 and 870,471.60

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Solution

The fourth proportional to 1,387,019.14, 1,913,545.74 and 870,471.60 is: 1,200,911.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,019.14 : 1,913,545.74 = 870,471.60 : x
  2. Step 2: Convert to fraction form
    1,387,019.14/1,913,545.74 = 870,471.60/x
  3. Step 3: Cross multiply
    1,387,019.14x = 1,913,545.74 × 870,471.60
  4. Step 4: Simplify right side
    1,387,019.14x = 1,665,687,221,970.98
  5. Step 5: Solve for x
    x = 1,665,687,221,970.98/1,387,019.14
  6. Step 6: Final answer
    x = 1,200,911.49

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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.