Home / 1,288,740.64-1,778,412.90-715,817.56

Finding the Fourth Proportional to 1,288,740.64, 1,778,412.90 and 715,817.56

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Solution

The fourth proportional to 1,288,740.64, 1,778,412.90 and 715,817.56 is: 987,800.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,740.64 : 1,778,412.90 = 715,817.56 : x
  2. Step 2: Convert to fraction form
    1,288,740.64/1,778,412.90 = 715,817.56/x
  3. Step 3: Cross multiply
    1,288,740.64x = 1,778,412.90 × 715,817.56
  4. Step 4: Simplify right side
    1,288,740.64x = 1,273,019,182,750.52
  5. Step 5: Solve for x
    x = 1,273,019,182,750.52/1,288,740.64
  6. Step 6: Final answer
    x = 987,800.91

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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.