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Finding the Fourth Proportional to 389,613.40, 537,756 and 228,520.34

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Solution

The fourth proportional to 389,613.40, 537,756 and 228,520.34 is: 315,410.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,613.40 : 537,756 = 228,520.34 : x
  2. Step 2: Convert to fraction form
    389,613.40/537,756 = 228,520.34/x
  3. Step 3: Cross multiply
    389,613.40x = 537,756 × 228,520.34
  4. Step 4: Simplify right side
    389,613.40x = 122,888,183,957.04
  5. Step 5: Solve for x
    x = 122,888,183,957.04/389,613.40
  6. Step 6: Final answer
    x = 315,410.57

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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.