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Finding the Fourth Proportional to 258,417.99, 387,705.60 and 132,146.91

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Solution

The fourth proportional to 258,417.99, 387,705.60 and 132,146.91 is: 198,260.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,417.99 : 387,705.60 = 132,146.91 : x
  2. Step 2: Convert to fraction form
    258,417.99/387,705.60 = 132,146.91/x
  3. Step 3: Cross multiply
    258,417.99x = 387,705.60 × 132,146.91
  4. Step 4: Simplify right side
    258,417.99x = 51,234,097,029.70
  5. Step 5: Solve for x
    x = 51,234,097,029.70/258,417.99
  6. Step 6: Final answer
    x = 198,260.57

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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.