Home / 678,787.10-1,017,921.45-205,315.10

Finding the Fourth Proportional to 678,787.10, 1,017,921.45 and 205,315.10

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Solution

The fourth proportional to 678,787.10, 1,017,921.45 and 205,315.10 is: 307,894.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,787.10 : 1,017,921.45 = 205,315.10 : x
  2. Step 2: Convert to fraction form
    678,787.10/1,017,921.45 = 205,315.10/x
  3. Step 3: Cross multiply
    678,787.10x = 1,017,921.45 × 205,315.10
  4. Step 4: Simplify right side
    678,787.10x = 208,994,644,298.90
  5. Step 5: Solve for x
    x = 208,994,644,298.90/678,787.10
  6. Step 6: Final answer
    x = 307,894.25

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1.5x scale

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.