Home / 420,418.80-630,628.20-417,794.40

Finding the Fourth Proportional to 420,418.80, 630,628.20 and 417,794.40

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Solution

The fourth proportional to 420,418.80, 630,628.20 and 417,794.40 is: 626,691.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,418.80 : 630,628.20 = 417,794.40 : x
  2. Step 2: Convert to fraction form
    420,418.80/630,628.20 = 417,794.40/x
  3. Step 3: Cross multiply
    420,418.80x = 630,628.20 × 417,794.40
  4. Step 4: Simplify right side
    420,418.80x = 263,472,930,442.08
  5. Step 5: Solve for x
    x = 263,472,930,442.08/420,418.80
  6. Step 6: Final answer
    x = 626,691.60

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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.