Home / 678,712.14-1,018,199.40-257,955.20

Finding the Fourth Proportional to 678,712.14, 1,018,199.40 and 257,955.20

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Solution

The fourth proportional to 678,712.14, 1,018,199.40 and 257,955.20 is: 386,982.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,712.14 : 1,018,199.40 = 257,955.20 : x
  2. Step 2: Convert to fraction form
    678,712.14/1,018,199.40 = 257,955.20/x
  3. Step 3: Cross multiply
    678,712.14x = 1,018,199.40 × 257,955.20
  4. Step 4: Simplify right side
    678,712.14x = 262,649,829,866.88
  5. Step 5: Solve for x
    x = 262,649,829,866.88/678,712.14
  6. Step 6: Final answer
    x = 386,982.66

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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.