Home / 386,048.40-578,878.20-228,325.20

Finding the Fourth Proportional to 386,048.40, 578,878.20 and 228,325.20

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Solution

The fourth proportional to 386,048.40, 578,878.20 and 228,325.20 is: 342,372.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,048.40 : 578,878.20 = 228,325.20 : x
  2. Step 2: Convert to fraction form
    386,048.40/578,878.20 = 228,325.20/x
  3. Step 3: Cross multiply
    386,048.40x = 578,878.20 × 228,325.20
  4. Step 4: Simplify right side
    386,048.40x = 132,172,480,790.64
  5. Step 5: Solve for x
    x = 132,172,480,790.64/386,048.40
  6. Step 6: Final answer
    x = 342,372.82

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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.