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Finding the Fourth Proportional to 257,652.90, 386,482.05 and 70,664.40

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Solution

The fourth proportional to 257,652.90, 386,482.05 and 70,664.40 is: 105,997.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,652.90 : 386,482.05 = 70,664.40 : x
  2. Step 2: Convert to fraction form
    257,652.90/386,482.05 = 70,664.40/x
  3. Step 3: Cross multiply
    257,652.90x = 386,482.05 × 70,664.40
  4. Step 4: Simplify right side
    257,652.90x = 27,310,522,174.02
  5. Step 5: Solve for x
    x = 27,310,522,174.02/257,652.90
  6. Step 6: Final answer
    x = 105,997.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.