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Finding the Fourth Proportional to 361,407.70, 542,111.55 and 256,431.70

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Solution

The fourth proportional to 361,407.70, 542,111.55 and 256,431.70 is: 384,647.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,407.70 : 542,111.55 = 256,431.70 : x
  2. Step 2: Convert to fraction form
    361,407.70/542,111.55 = 256,431.70/x
  3. Step 3: Cross multiply
    361,407.70x = 542,111.55 × 256,431.70
  4. Step 4: Simplify right side
    361,407.70x = 139,014,586,356.14
  5. Step 5: Solve for x
    x = 139,014,586,356.14/361,407.70
  6. Step 6: Final answer
    x = 384,647.55

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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.