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Finding the Fourth Proportional to 420,378.92, 630,569.06 and 336,671.50

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Solution

The fourth proportional to 420,378.92, 630,569.06 and 336,671.50 is: 505,007.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,378.92 : 630,569.06 = 336,671.50 : x
  2. Step 2: Convert to fraction form
    420,378.92/630,569.06 = 336,671.50/x
  3. Step 3: Cross multiply
    420,378.92x = 630,569.06 × 336,671.50
  4. Step 4: Simplify right side
    420,378.92x = 212,294,628,130.95
  5. Step 5: Solve for x
    x = 212,294,628,130.95/420,378.92
  6. Step 6: Final answer
    x = 505,007.79

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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.