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Finding the Fourth Proportional to 330,434.16, 455,984.28 and 187,191.28

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Solution

The fourth proportional to 330,434.16, 455,984.28 and 187,191.28 is: 258,315.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,434.16 : 455,984.28 = 187,191.28 : x
  2. Step 2: Convert to fraction form
    330,434.16/455,984.28 = 187,191.28/x
  3. Step 3: Cross multiply
    330,434.16x = 455,984.28 × 187,191.28
  4. Step 4: Simplify right side
    330,434.16x = 85,356,281,033.08
  5. Step 5: Solve for x
    x = 85,356,281,033.08/330,434.16
  6. Step 6: Final answer
    x = 258,315.55

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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.