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Finding the Fourth Proportional to 330,031.60, 494,172.60 and 260,047.60

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Solution

The fourth proportional to 330,031.60, 494,172.60 and 260,047.60 is: 389,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,031.60 : 494,172.60 = 260,047.60 : x
  2. Step 2: Convert to fraction form
    330,031.60/494,172.60 = 260,047.60/x
  3. Step 3: Cross multiply
    330,031.60x = 494,172.60 × 260,047.60
  4. Step 4: Simplify right side
    330,031.60x = 128,508,398,615.76
  5. Step 5: Solve for x
    x = 128,508,398,615.76/330,031.60
  6. Step 6: Final answer
    x = 389,382.10

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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.