Home / 1,288,435.68-1,778,100.42-715,478.10

Finding the Fourth Proportional to 1,288,435.68, 1,778,100.42 and 715,478.10

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Solution

The fourth proportional to 1,288,435.68, 1,778,100.42 and 715,478.10 is: 987,392.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,435.68 : 1,778,100.42 = 715,478.10 : x
  2. Step 2: Convert to fraction form
    1,288,435.68/1,778,100.42 = 715,478.10/x
  3. Step 3: Cross multiply
    1,288,435.68x = 1,778,100.42 × 715,478.10
  4. Step 4: Simplify right side
    1,288,435.68x = 1,272,191,910,110.80
  5. Step 5: Solve for x
    x = 1,272,191,910,110.80/1,288,435.68
  6. Step 6: Final answer
    x = 987,392.64

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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.