Home / 1,212,989.20-1,820,981.40-763,709.20

Finding the Fourth Proportional to 1,212,989.20, 1,820,981.40 and 763,709.20

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Solution

The fourth proportional to 1,212,989.20, 1,820,981.40 and 763,709.20 is: 1,146,506.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,989.20 : 1,820,981.40 = 763,709.20 : x
  2. Step 2: Convert to fraction form
    1,212,989.20/1,820,981.40 = 763,709.20/x
  3. Step 3: Cross multiply
    1,212,989.20x = 1,820,981.40 × 763,709.20
  4. Step 4: Simplify right side
    1,212,989.20x = 1,390,700,248,208.88
  5. Step 5: Solve for x
    x = 1,390,700,248,208.88/1,212,989.20
  6. Step 6: Final answer
    x = 1,146,506.70

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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.