Home / 811,492.80-1,217,983.20-412,411.20

Finding the Fourth Proportional to 811,492.80, 1,217,983.20 and 412,411.20

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Solution

The fourth proportional to 811,492.80, 1,217,983.20 and 412,411.20 is: 618,994.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,492.80 : 1,217,983.20 = 412,411.20 : x
  2. Step 2: Convert to fraction form
    811,492.80/1,217,983.20 = 412,411.20/x
  3. Step 3: Cross multiply
    811,492.80x = 1,217,983.20 × 412,411.20
  4. Step 4: Simplify right side
    811,492.80x = 502,309,913,091.84
  5. Step 5: Solve for x
    x = 502,309,913,091.84/811,492.80
  6. Step 6: Final answer
    x = 618,994.91

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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.