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Finding the Fourth Proportional to 257,464.50, 386,223.48 and 70,476

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Solution

The fourth proportional to 257,464.50, 386,223.48 and 70,476 is: 105,721.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,464.50 : 386,223.48 = 70,476 : x
  2. Step 2: Convert to fraction form
    257,464.50/386,223.48 = 70,476/x
  3. Step 3: Cross multiply
    257,464.50x = 386,223.48 × 70,476
  4. Step 4: Simplify right side
    257,464.50x = 27,219,485,976.48
  5. Step 5: Solve for x
    x = 27,219,485,976.48/257,464.50
  6. Step 6: Final answer
    x = 105,721.32

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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.