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Finding the Fourth Proportional to 310,080.30, 465,120.45 and 85,440.30

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Solution

The fourth proportional to 310,080.30, 465,120.45 and 85,440.30 is: 128,160.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,080.30 : 465,120.45 = 85,440.30 : x
  2. Step 2: Convert to fraction form
    310,080.30/465,120.45 = 85,440.30/x
  3. Step 3: Cross multiply
    310,080.30x = 465,120.45 × 85,440.30
  4. Step 4: Simplify right side
    310,080.30x = 39,740,030,784.14
  5. Step 5: Solve for x
    x = 39,740,030,784.14/310,080.30
  6. Step 6: Final answer
    x = 128,160.45

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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.