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Finding the Fourth Proportional to 407,612.80, 612,002.40 and 308,468.80

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Solution

The fourth proportional to 407,612.80, 612,002.40 and 308,468.80 is: 463,144.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,612.80 : 612,002.40 = 308,468.80 : x
  2. Step 2: Convert to fraction form
    407,612.80/612,002.40 = 308,468.80/x
  3. Step 3: Cross multiply
    407,612.80x = 612,002.40 × 308,468.80
  4. Step 4: Simplify right side
    407,612.80x = 188,783,645,925.12
  5. Step 5: Solve for x
    x = 188,783,645,925.12/407,612.80
  6. Step 6: Final answer
    x = 463,144.55

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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.