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Finding the Fourth Proportional to 639,635.55, 882,710.82 and 353,173.74

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Solution

The fourth proportional to 639,635.55, 882,710.82 and 353,173.74 is: 487,387.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,635.55 : 882,710.82 = 353,173.74 : x
  2. Step 2: Convert to fraction form
    639,635.55/882,710.82 = 353,173.74/x
  3. Step 3: Cross multiply
    639,635.55x = 882,710.82 × 353,173.74
  4. Step 4: Simplify right side
    639,635.55x = 311,750,281,637.87
  5. Step 5: Solve for x
    x = 311,750,281,637.87/639,635.55
  6. Step 6: Final answer
    x = 487,387.36

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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.