Home / 1,387,026.15-1,913,555.40-870,478.62

Finding the Fourth Proportional to 1,387,026.15, 1,913,555.40 and 870,478.62

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Solution

The fourth proportional to 1,387,026.15, 1,913,555.40 and 870,478.62 is: 1,200,921.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,026.15 : 1,913,555.40 = 870,478.62 : x
  2. Step 2: Convert to fraction form
    1,387,026.15/1,913,555.40 = 870,478.62/x
  3. Step 3: Cross multiply
    1,387,026.15x = 1,913,555.40 × 870,478.62
  4. Step 4: Simplify right side
    1,387,026.15x = 1,665,709,063,885.55
  5. Step 5: Solve for x
    x = 1,665,709,063,885.55/1,387,026.15
  6. Step 6: Final answer
    x = 1,200,921.17

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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.