Home / 309,554.15-427,178.07-173,585.11

Finding the Fourth Proportional to 309,554.15, 427,178.07 and 173,585.11

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Solution

The fourth proportional to 309,554.15, 427,178.07 and 173,585.11 is: 239,543.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,554.15 : 427,178.07 = 173,585.11 : x
  2. Step 2: Convert to fraction form
    309,554.15/427,178.07 = 173,585.11/x
  3. Step 3: Cross multiply
    309,554.15x = 427,178.07 × 173,585.11
  4. Step 4: Simplify right side
    309,554.15x = 74,151,752,270.54
  5. Step 5: Solve for x
    x = 74,151,752,270.54/309,554.15
  6. Step 6: Final answer
    x = 239,543.72

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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.