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Finding the Fourth Proportional to 419,895.04, 630,206.52 and 220,356.40

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Solution

The fourth proportional to 419,895.04, 630,206.52 and 220,356.40 is: 330,725.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,895.04 : 630,206.52 = 220,356.40 : x
  2. Step 2: Convert to fraction form
    419,895.04/630,206.52 = 220,356.40/x
  3. Step 3: Cross multiply
    419,895.04x = 630,206.52 × 220,356.40
  4. Step 4: Simplify right side
    419,895.04x = 138,870,041,204.65
  5. Step 5: Solve for x
    x = 138,870,041,204.65/419,895.04
  6. Step 6: Final answer
    x = 330,725.60

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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.