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Finding the Fourth Proportional to 386,218.50, 579,328.56 and 164,602.50

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Solution

The fourth proportional to 386,218.50, 579,328.56 and 164,602.50 is: 246,904.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,218.50 : 579,328.56 = 164,602.50 : x
  2. Step 2: Convert to fraction form
    386,218.50/579,328.56 = 164,602.50/x
  3. Step 3: Cross multiply
    386,218.50x = 579,328.56 × 164,602.50
  4. Step 4: Simplify right side
    386,218.50x = 95,358,929,297.40
  5. Step 5: Solve for x
    x = 95,358,929,297.40/386,218.50
  6. Step 6: Final answer
    x = 246,904.10

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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.