Home / 639,984.24-883,178.64-353,516.40

Finding the Fourth Proportional to 639,984.24, 883,178.64 and 353,516.40

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Solution

The fourth proportional to 639,984.24, 883,178.64 and 353,516.40 is: 487,852.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,984.24 : 883,178.64 = 353,516.40 : x
  2. Step 2: Convert to fraction form
    639,984.24/883,178.64 = 353,516.40/x
  3. Step 3: Cross multiply
    639,984.24x = 883,178.64 × 353,516.40
  4. Step 4: Simplify right side
    639,984.24x = 312,218,133,369.70
  5. Step 5: Solve for x
    x = 312,218,133,369.70/639,984.24
  6. Step 6: Final answer
    x = 487,852.85

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Double scale
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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.