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Finding the Fourth Proportional to 330,395.65, 455,955.34 and 187,155.65

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Solution

The fourth proportional to 330,395.65, 455,955.34 and 187,155.65 is: 258,280.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,395.65 : 455,955.34 = 187,155.65 : x
  2. Step 2: Convert to fraction form
    330,395.65/455,955.34 = 187,155.65/x
  3. Step 3: Cross multiply
    330,395.65x = 455,955.34 × 187,155.65
  4. Step 4: Simplify right side
    330,395.65x = 85,334,618,028.67
  5. Step 5: Solve for x
    x = 85,334,618,028.67/330,395.65
  6. Step 6: Final answer
    x = 258,280.09

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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.