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Finding the Fourth Proportional to 257,374.89, 386,056.87 and 70,386.39

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Solution

The fourth proportional to 257,374.89, 386,056.87 and 70,386.39 is: 105,578.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,374.89 : 386,056.87 = 70,386.39 : x
  2. Step 2: Convert to fraction form
    257,374.89/386,056.87 = 70,386.39/x
  3. Step 3: Cross multiply
    257,374.89x = 386,056.87 × 70,386.39
  4. Step 4: Simplify right side
    257,374.89x = 27,173,149,238.03
  5. Step 5: Solve for x
    x = 27,173,149,238.03/257,374.89
  6. Step 6: Final answer
    x = 105,578.09

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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.