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Finding the Fourth Proportional to 286,879.70, 430,319.55 and 172,718.30

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Solution

The fourth proportional to 286,879.70, 430,319.55 and 172,718.30 is: 259,077.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,879.70 : 430,319.55 = 172,718.30 : x
  2. Step 2: Convert to fraction form
    286,879.70/430,319.55 = 172,718.30/x
  3. Step 3: Cross multiply
    286,879.70x = 430,319.55 × 172,718.30
  4. Step 4: Simplify right side
    286,879.70x = 74,324,061,132.77
  5. Step 5: Solve for x
    x = 74,324,061,132.77/286,879.70
  6. Step 6: Final answer
    x = 259,077.45

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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.