Home / 819,864.95-1,230,171.10-420,785.98

Finding the Fourth Proportional to 819,864.95, 1,230,171.10 and 420,785.98

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Solution

The fourth proportional to 819,864.95, 1,230,171.10 and 420,785.98 is: 631,370.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,864.95 : 1,230,171.10 = 420,785.98 : x
  2. Step 2: Convert to fraction form
    819,864.95/1,230,171.10 = 420,785.98/x
  3. Step 3: Cross multiply
    819,864.95x = 1,230,171.10 × 420,785.98
  4. Step 4: Simplify right side
    819,864.95x = 517,638,746,023.85
  5. Step 5: Solve for x
    x = 517,638,746,023.85/819,864.95
  6. Step 6: Final answer
    x = 631,370.75

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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.