Home / 639,981.78-883,157.94-353,495.72

Finding the Fourth Proportional to 639,981.78, 883,157.94 and 353,495.72

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Solution

The fourth proportional to 639,981.78, 883,157.94 and 353,495.72 is: 487,814.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,981.78 : 883,157.94 = 353,495.72 : x
  2. Step 2: Convert to fraction form
    639,981.78/883,157.94 = 353,495.72/x
  3. Step 3: Cross multiply
    639,981.78x = 883,157.94 × 353,495.72
  4. Step 4: Simplify right side
    639,981.78x = 312,192,547,458.23
  5. Step 5: Solve for x
    x = 312,192,547,458.23/639,981.78
  6. Step 6: Final answer
    x = 487,814.74

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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.