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Finding the Fourth Proportional to 377,143.50, 520,309.58 and 215,911.64

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Solution

The fourth proportional to 377,143.50, 520,309.58 and 215,911.64 is: 297,873.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,143.50 : 520,309.58 = 215,911.64 : x
  2. Step 2: Convert to fraction form
    377,143.50/520,309.58 = 215,911.64/x
  3. Step 3: Cross multiply
    377,143.50x = 520,309.58 × 215,911.64
  4. Step 4: Simplify right side
    377,143.50x = 112,340,894,725.51
  5. Step 5: Solve for x
    x = 112,340,894,725.51/377,143.50
  6. Step 6: Final answer
    x = 297,873.08

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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.