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Finding the Fourth Proportional to 389,309.70, 537,145.74 and 228,078.12

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Solution

The fourth proportional to 389,309.70, 537,145.74 and 228,078.12 is: 314,688.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,309.70 : 537,145.74 = 228,078.12 : x
  2. Step 2: Convert to fraction form
    389,309.70/537,145.74 = 228,078.12/x
  3. Step 3: Cross multiply
    389,309.70x = 537,145.74 × 228,078.12
  4. Step 4: Simplify right side
    389,309.70x = 122,511,190,545.21
  5. Step 5: Solve for x
    x = 122,511,190,545.21/389,309.70
  6. Step 6: Final answer
    x = 314,688.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.