Home / 330,345.66-455,940.90-215,424.78

Finding the Fourth Proportional to 330,345.66, 455,940.90 and 215,424.78

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Solution

The fourth proportional to 330,345.66, 455,940.90 and 215,424.78 is: 297,327.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,345.66 : 455,940.90 = 215,424.78 : x
  2. Step 2: Convert to fraction form
    330,345.66/455,940.90 = 215,424.78/x
  3. Step 3: Cross multiply
    330,345.66x = 455,940.90 × 215,424.78
  4. Step 4: Simplify right side
    330,345.66x = 98,220,968,075.50
  5. Step 5: Solve for x
    x = 98,220,968,075.50/330,345.66
  6. Step 6: Final answer
    x = 297,327.86

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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.