Home / 1,288,893.60-1,778,646.60-715,921.20

Finding the Fourth Proportional to 1,288,893.60, 1,778,646.60 and 715,921.20

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Solution

The fourth proportional to 1,288,893.60, 1,778,646.60 and 715,921.20 is: 987,956.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,893.60 : 1,778,646.60 = 715,921.20 : x
  2. Step 2: Convert to fraction form
    1,288,893.60/1,778,646.60 = 715,921.20/x
  3. Step 3: Cross multiply
    1,288,893.60x = 1,778,646.60 × 715,921.20
  4. Step 4: Simplify right side
    1,288,893.60x = 1,273,370,808,247.92
  5. Step 5: Solve for x
    x = 1,273,370,808,247.92/1,288,893.60
  6. Step 6: Final answer
    x = 987,956.50

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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.