Home / 1,317,695.20-1,976,542.80-778,818.40

Finding the Fourth Proportional to 1,317,695.20, 1,976,542.80 and 778,818.40

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Solution

The fourth proportional to 1,317,695.20, 1,976,542.80 and 778,818.40 is: 1,168,227.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317,695.20 : 1,976,542.80 = 778,818.40 : x
  2. Step 2: Convert to fraction form
    1,317,695.20/1,976,542.80 = 778,818.40/x
  3. Step 3: Cross multiply
    1,317,695.20x = 1,976,542.80 × 778,818.40
  4. Step 4: Simplify right side
    1,317,695.20x = 1,539,367,901,027.52
  5. Step 5: Solve for x
    x = 1,539,367,901,027.52/1,317,695.20
  6. Step 6: Final answer
    x = 1,168,227.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.