Home / 1,288,638.41-1,778,325.15-715,678.57

Finding the Fourth Proportional to 1,288,638.41, 1,778,325.15 and 715,678.57

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Solution

The fourth proportional to 1,288,638.41, 1,778,325.15 and 715,678.57 is: 987,638.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,638.41 : 1,778,325.15 = 715,678.57 : x
  2. Step 2: Convert to fraction form
    1,288,638.41/1,778,325.15 = 715,678.57/x
  3. Step 3: Cross multiply
    1,288,638.41x = 1,778,325.15 × 715,678.57
  4. Step 4: Simplify right side
    1,288,638.41x = 1,272,709,187,877.02
  5. Step 5: Solve for x
    x = 1,272,709,187,877.02/1,288,638.41
  6. Step 6: Final answer
    x = 987,638.72

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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.