Home / 818,972.10-1,228,458.15-420,391.35

Finding the Fourth Proportional to 818,972.10, 1,228,458.15 and 420,391.35

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Solution

The fourth proportional to 818,972.10, 1,228,458.15 and 420,391.35 is: 630,587.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,972.10 : 1,228,458.15 = 420,391.35 : x
  2. Step 2: Convert to fraction form
    818,972.10/1,228,458.15 = 420,391.35/x
  3. Step 3: Cross multiply
    818,972.10x = 1,228,458.15 × 420,391.35
  4. Step 4: Simplify right side
    818,972.10x = 516,433,180,097.00
  5. Step 5: Solve for x
    x = 516,433,180,097.00/818,972.10
  6. Step 6: Final answer
    x = 630,587.03

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1.5x scale

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.