Home / 1,288,557.72-1,778,160.90-715,634.80

Finding the Fourth Proportional to 1,288,557.72, 1,778,160.90 and 715,634.80

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Solution

The fourth proportional to 1,288,557.72, 1,778,160.90 and 715,634.80 is: 987,548.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,557.72 : 1,778,160.90 = 715,634.80 : x
  2. Step 2: Convert to fraction form
    1,288,557.72/1,778,160.90 = 715,634.80/x
  3. Step 3: Cross multiply
    1,288,557.72x = 1,778,160.90 × 715,634.80
  4. Step 4: Simplify right side
    1,288,557.72x = 1,272,513,818,277.55
  5. Step 5: Solve for x
    x = 1,272,513,818,277.55/1,288,557.72
  6. Step 6: Final answer
    x = 987,548.95

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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.