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Finding the Fourth Proportional to 330,417.60, 455,979.50 and 187,174.58

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Solution

The fourth proportional to 330,417.60, 455,979.50 and 187,174.58 is: 258,302.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,417.60 : 455,979.50 = 187,174.58 : x
  2. Step 2: Convert to fraction form
    330,417.60/455,979.50 = 187,174.58/x
  3. Step 3: Cross multiply
    330,417.60x = 455,979.50 × 187,174.58
  4. Step 4: Simplify right side
    330,417.60x = 85,347,771,401.11
  5. Step 5: Solve for x
    x = 85,347,771,401.11/330,417.60
  6. Step 6: Final answer
    x = 258,302.74

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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.