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Finding the Fourth Proportional to 553,278.12, 763,516.24 and 311,563.60

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Solution

The fourth proportional to 553,278.12, 763,516.24 and 311,563.60 is: 429,953.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,278.12 : 763,516.24 = 311,563.60 : x
  2. Step 2: Convert to fraction form
    553,278.12/763,516.24 = 311,563.60/x
  3. Step 3: Cross multiply
    553,278.12x = 763,516.24 × 311,563.60
  4. Step 4: Simplify right side
    553,278.12x = 237,883,868,392.86
  5. Step 5: Solve for x
    x = 237,883,868,392.86/553,278.12
  6. Step 6: Final answer
    x = 429,953.51

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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.