Home / 763,178.12-1,143,690.92-421,775.28

Finding the Fourth Proportional to 763,178.12, 1,143,690.92 and 421,775.28

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Solution

The fourth proportional to 763,178.12, 1,143,690.92 and 421,775.28 is: 632,068.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,178.12 : 1,143,690.92 = 421,775.28 : x
  2. Step 2: Convert to fraction form
    763,178.12/1,143,690.92 = 421,775.28/x
  3. Step 3: Cross multiply
    763,178.12x = 1,143,690.92 × 421,775.28
  4. Step 4: Simplify right side
    763,178.12x = 482,380,558,016.46
  5. Step 5: Solve for x
    x = 482,380,558,016.46/763,178.12
  6. Step 6: Final answer
    x = 632,068.12

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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.