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Finding the Fourth Proportional to 309,888.91, 427,628.73 and 173,910.16

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Solution

The fourth proportional to 309,888.91, 427,628.73 and 173,910.16 is: 239,985.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,888.91 : 427,628.73 = 173,910.16 : x
  2. Step 2: Convert to fraction form
    309,888.91/427,628.73 = 173,910.16/x
  3. Step 3: Cross multiply
    309,888.91x = 427,628.73 × 173,910.16
  4. Step 4: Simplify right side
    309,888.91x = 74,368,980,854.90
  5. Step 5: Solve for x
    x = 74,368,980,854.90/309,888.91
  6. Step 6: Final answer
    x = 239,985.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.