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Finding the Fourth Proportional to 262,916.10, 394,276.95 and 85,428.90

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Solution

The fourth proportional to 262,916.10, 394,276.95 and 85,428.90 is: 128,111.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,916.10 : 394,276.95 = 85,428.90 : x
  2. Step 2: Convert to fraction form
    262,916.10/394,276.95 = 85,428.90/x
  3. Step 3: Cross multiply
    262,916.10x = 394,276.95 × 85,428.90
  4. Step 4: Simplify right side
    262,916.10x = 33,682,646,133.86
  5. Step 5: Solve for x
    x = 33,682,646,133.86/262,916.10
  6. Step 6: Final answer
    x = 128,111.77

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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.