Home / 495,653.74-683,979.87-280,789.42

Finding the Fourth Proportional to 495,653.74, 683,979.87 and 280,789.42

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Solution

The fourth proportional to 495,653.74, 683,979.87 and 280,789.42 is: 387,476.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,653.74 : 683,979.87 = 280,789.42 : x
  2. Step 2: Convert to fraction form
    495,653.74/683,979.87 = 280,789.42/x
  3. Step 3: Cross multiply
    495,653.74x = 683,979.87 × 280,789.42
  4. Step 4: Simplify right side
    495,653.74x = 192,054,310,988.98
  5. Step 5: Solve for x
    x = 192,054,310,988.98/495,653.74
  6. Step 6: Final answer
    x = 387,476.77

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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.