Home / 778,521.12-1,074,358.56-420,825.12

Finding the Fourth Proportional to 778,521.12, 1,074,358.56 and 420,825.12

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Solution

The fourth proportional to 778,521.12, 1,074,358.56 and 420,825.12 is: 580,738.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,521.12 : 1,074,358.56 = 420,825.12 : x
  2. Step 2: Convert to fraction form
    778,521.12/1,074,358.56 = 420,825.12/x
  3. Step 3: Cross multiply
    778,521.12x = 1,074,358.56 × 420,825.12
  4. Step 4: Simplify right side
    778,521.12x = 452,117,069,935.03
  5. Step 5: Solve for x
    x = 452,117,069,935.03/778,521.12
  6. Step 6: Final answer
    x = 580,738.35

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1.5x scale

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.