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Finding the Fourth Proportional to 330,314.80, 455,907 and 217,148.08

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Solution

The fourth proportional to 330,314.80, 455,907 and 217,148.08 is: 299,712.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,314.80 : 455,907 = 217,148.08 : x
  2. Step 2: Convert to fraction form
    330,314.80/455,907 = 217,148.08/x
  3. Step 3: Cross multiply
    330,314.80x = 455,907 × 217,148.08
  4. Step 4: Simplify right side
    330,314.80x = 98,999,329,708.56
  5. Step 5: Solve for x
    x = 98,999,329,708.56/330,314.80
  6. Step 6: Final answer
    x = 299,712.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.