Home / 1,288,627.91-1,778,306.53-715,721.39

Finding the Fourth Proportional to 1,288,627.91, 1,778,306.53 and 715,721.39

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Solution

The fourth proportional to 1,288,627.91, 1,778,306.53 and 715,721.39 is: 987,695.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,627.91 : 1,778,306.53 = 715,721.39 : x
  2. Step 2: Convert to fraction form
    1,288,627.91/1,778,306.53 = 715,721.39/x
  3. Step 3: Cross multiply
    1,288,627.91x = 1,778,306.53 × 715,721.39
  4. Step 4: Simplify right side
    1,288,627.91x = 1,272,772,021,497.68
  5. Step 5: Solve for x
    x = 1,272,772,021,497.68/1,288,627.91
  6. Step 6: Final answer
    x = 987,695.53

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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.