Home / 1,288,642.80-1,778,331.18-715,682.94

Finding the Fourth Proportional to 1,288,642.80, 1,778,331.18 and 715,682.94

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Solution

The fourth proportional to 1,288,642.80, 1,778,331.18 and 715,682.94 is: 987,644.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,642.80 : 1,778,331.18 = 715,682.94 : x
  2. Step 2: Convert to fraction form
    1,288,642.80/1,778,331.18 = 715,682.94/x
  3. Step 3: Cross multiply
    1,288,642.80x = 1,778,331.18 × 715,682.94
  4. Step 4: Simplify right side
    1,288,642.80x = 1,272,721,287,196.07
  5. Step 5: Solve for x
    x = 1,272,721,287,196.07/1,288,642.80
  6. Step 6: Final answer
    x = 987,644.74

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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.