Home / 279,153.12-385,196.40-188,705.82

Finding the Fourth Proportional to 279,153.12, 385,196.40 and 188,705.82

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Solution

The fourth proportional to 279,153.12, 385,196.40 and 188,705.82 is: 260,390.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,153.12 : 385,196.40 = 188,705.82 : x
  2. Step 2: Convert to fraction form
    279,153.12/385,196.40 = 188,705.82/x
  3. Step 3: Cross multiply
    279,153.12x = 385,196.40 × 188,705.82
  4. Step 4: Simplify right side
    279,153.12x = 72,688,802,523.05
  5. Step 5: Solve for x
    x = 72,688,802,523.05/279,153.12
  6. Step 6: Final answer
    x = 260,390.44

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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.