Home / 437,904.60-656,856.90-420,408.60

Finding the Fourth Proportional to 437,904.60, 656,856.90 and 420,408.60

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Solution

The fourth proportional to 437,904.60, 656,856.90 and 420,408.60 is: 630,612.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,904.60 : 656,856.90 = 420,408.60 : x
  2. Step 2: Convert to fraction form
    437,904.60/656,856.90 = 420,408.60/x
  3. Step 3: Cross multiply
    437,904.60x = 656,856.90 × 420,408.60
  4. Step 4: Simplify right side
    437,904.60x = 276,148,289,729.34
  5. Step 5: Solve for x
    x = 276,148,289,729.34/437,904.60
  6. Step 6: Final answer
    x = 630,612.90

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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.