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Finding the Fourth Proportional to 307,621.65, 429,620.55 and 307,621.65

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Solution

The fourth proportional to 307,621.65, 429,620.55 and 307,621.65 is: 429,620.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,621.65 : 429,620.55 = 307,621.65 : x
  2. Step 2: Convert to fraction form
    307,621.65/429,620.55 = 307,621.65/x
  3. Step 3: Cross multiply
    307,621.65x = 429,620.55 × 307,621.65
  4. Step 4: Simplify right side
    307,621.65x = 132,160,582,464.91
  5. Step 5: Solve for x
    x = 132,160,582,464.91/307,621.65
  6. Step 6: Final answer
    x = 429,620.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.