Home / 678,705.14-1,018,188.90-257,948.20

Finding the Fourth Proportional to 678,705.14, 1,018,188.90 and 257,948.20

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Solution

The fourth proportional to 678,705.14, 1,018,188.90 and 257,948.20 is: 386,972.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,705.14 : 1,018,188.90 = 257,948.20 : x
  2. Step 2: Convert to fraction form
    678,705.14/1,018,188.90 = 257,948.20/x
  3. Step 3: Cross multiply
    678,705.14x = 1,018,188.90 × 257,948.20
  4. Step 4: Simplify right side
    678,705.14x = 262,639,994,014.98
  5. Step 5: Solve for x
    x = 262,639,994,014.98/678,705.14
  6. Step 6: Final answer
    x = 386,972.16

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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.