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Finding the Fourth Proportional to 312,015.40, 468,023.10 and 256,028.20

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Solution

The fourth proportional to 312,015.40, 468,023.10 and 256,028.20 is: 384,042.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,015.40 : 468,023.10 = 256,028.20 : x
  2. Step 2: Convert to fraction form
    312,015.40/468,023.10 = 256,028.20/x
  3. Step 3: Cross multiply
    312,015.40x = 468,023.10 × 256,028.20
  4. Step 4: Simplify right side
    312,015.40x = 119,827,111,851.42
  5. Step 5: Solve for x
    x = 119,827,111,851.42/312,015.40
  6. Step 6: Final answer
    x = 384,042.30

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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.