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Finding the Fourth Proportional to 328,251.10, 492,031.05 and 128,494.30

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Solution

The fourth proportional to 328,251.10, 492,031.05 and 128,494.30 is: 192,606.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,251.10 : 492,031.05 = 128,494.30 : x
  2. Step 2: Convert to fraction form
    328,251.10/492,031.05 = 128,494.30/x
  3. Step 3: Cross multiply
    328,251.10x = 492,031.05 × 128,494.30
  4. Step 4: Simplify right side
    328,251.10x = 63,223,185,348.02
  5. Step 5: Solve for x
    x = 63,223,185,348.02/328,251.10
  6. Step 6: Final answer
    x = 192,606.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.