Home / 385,678.16-578,890.40-186,139.01

Finding the Fourth Proportional to 385,678.16, 578,890.40 and 186,139.01

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Solution

The fourth proportional to 385,678.16, 578,890.40 and 186,139.01 is: 279,388.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,678.16 : 578,890.40 = 186,139.01 : x
  2. Step 2: Convert to fraction form
    385,678.16/578,890.40 = 186,139.01/x
  3. Step 3: Cross multiply
    385,678.16x = 578,890.40 × 186,139.01
  4. Step 4: Simplify right side
    385,678.16x = 107,754,086,471.04
  5. Step 5: Solve for x
    x = 107,754,086,471.04/385,678.16
  6. Step 6: Final answer
    x = 279,388.61

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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.