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Finding the Fourth Proportional to 258,758.40, 387,830.40 and 108,998.40

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Solution

The fourth proportional to 258,758.40, 387,830.40 and 108,998.40 is: 163,368.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,758.40 : 387,830.40 = 108,998.40 : x
  2. Step 2: Convert to fraction form
    258,758.40/387,830.40 = 108,998.40/x
  3. Step 3: Cross multiply
    258,758.40x = 387,830.40 × 108,998.40
  4. Step 4: Simplify right side
    258,758.40x = 42,272,893,071.36
  5. Step 5: Solve for x
    x = 42,272,893,071.36/258,758.40
  6. Step 6: Final answer
    x = 163,368.20

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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.