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Finding the Fourth Proportional to 495,412.49, 683,711.39 and 280,590.77

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Solution

The fourth proportional to 495,412.49, 683,711.39 and 280,590.77 is: 387,239.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,412.49 : 683,711.39 = 280,590.77 : x
  2. Step 2: Convert to fraction form
    495,412.49/683,711.39 = 280,590.77/x
  3. Step 3: Cross multiply
    495,412.49x = 683,711.39 × 280,590.77
  4. Step 4: Simplify right side
    495,412.49x = 191,843,102,660.79
  5. Step 5: Solve for x
    x = 191,843,102,660.79/495,412.49
  6. Step 6: Final answer
    x = 387,239.14

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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.