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Finding the Fourth Proportional to 420,150.80, 630,226.20 and 346,339.55

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Solution

The fourth proportional to 420,150.80, 630,226.20 and 346,339.55 is: 519,509.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,150.80 : 630,226.20 = 346,339.55 : x
  2. Step 2: Convert to fraction form
    420,150.80/630,226.20 = 346,339.55/x
  3. Step 3: Cross multiply
    420,150.80x = 630,226.20 × 346,339.55
  4. Step 4: Simplify right side
    420,150.80x = 218,272,258,506.21
  5. Step 5: Solve for x
    x = 218,272,258,506.21/420,150.80
  6. Step 6: Final answer
    x = 519,509.33

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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.