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Finding the Fourth Proportional to 638,181.72, 880,686.35 and 351,702.03

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Solution

The fourth proportional to 638,181.72, 880,686.35 and 351,702.03 is: 485,346.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,181.72 : 880,686.35 = 351,702.03 : x
  2. Step 2: Convert to fraction form
    638,181.72/880,686.35 = 351,702.03/x
  3. Step 3: Cross multiply
    638,181.72x = 880,686.35 × 351,702.03
  4. Step 4: Simplify right side
    638,181.72x = 309,739,177,088.29
  5. Step 5: Solve for x
    x = 309,739,177,088.29/638,181.72
  6. Step 6: Final answer
    x = 485,346.36

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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.