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Finding the Fourth Proportional to 420,417.60, 630,626.40 and 124,929.60

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Solution

The fourth proportional to 420,417.60, 630,626.40 and 124,929.60 is: 187,394.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,417.60 : 630,626.40 = 124,929.60 : x
  2. Step 2: Convert to fraction form
    420,417.60/630,626.40 = 124,929.60/x
  3. Step 3: Cross multiply
    420,417.60x = 630,626.40 × 124,929.60
  4. Step 4: Simplify right side
    420,417.60x = 78,783,903,901.44
  5. Step 5: Solve for x
    x = 78,783,903,901.44/420,417.60
  6. Step 6: Final answer
    x = 187,394.40

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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.