Home / 645,251.54-890,441.73-358,769.12

Finding the Fourth Proportional to 645,251.54, 890,441.73 and 358,769.12

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Solution

The fourth proportional to 645,251.54, 890,441.73 and 358,769.12 is: 495,098.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,251.54 : 890,441.73 = 358,769.12 : x
  2. Step 2: Convert to fraction form
    645,251.54/890,441.73 = 358,769.12/x
  3. Step 3: Cross multiply
    645,251.54x = 890,441.73 × 358,769.12
  4. Step 4: Simplify right side
    645,251.54x = 319,462,991,431.17
  5. Step 5: Solve for x
    x = 319,462,991,431.17/645,251.54
  6. Step 6: Final answer
    x = 495,098.38

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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.