Home / 778,398.72-1,074,189.60-420,702.72

Finding the Fourth Proportional to 778,398.72, 1,074,189.60 and 420,702.72

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Solution

The fourth proportional to 778,398.72, 1,074,189.60 and 420,702.72 is: 580,569.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    778,398.72 : 1,074,189.60 = 420,702.72 : x
  2. Step 2: Convert to fraction form
    778,398.72/1,074,189.60 = 420,702.72/x
  3. Step 3: Cross multiply
    778,398.72x = 1,074,189.60 × 420,702.72
  4. Step 4: Simplify right side
    778,398.72x = 451,914,486,515.71
  5. Step 5: Solve for x
    x = 451,914,486,515.71/778,398.72
  6. Step 6: Final answer
    x = 580,569.41

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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.