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Finding the Fourth Proportional to 495,535.72, 683,819.94 and 280,687.72

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Solution

The fourth proportional to 495,535.72, 683,819.94 and 280,687.72 is: 387,338.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,535.72 : 683,819.94 = 280,687.72 : x
  2. Step 2: Convert to fraction form
    495,535.72/683,819.94 = 280,687.72/x
  3. Step 3: Cross multiply
    495,535.72x = 683,819.94 × 280,687.72
  4. Step 4: Simplify right side
    495,535.72x = 191,939,859,849.14
  5. Step 5: Solve for x
    x = 191,939,859,849.14/495,535.72
  6. Step 6: Final answer
    x = 387,338.09

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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.