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Finding the Fourth Proportional to 247,987.20, 371,980.80 and 164,006.40

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Solution

The fourth proportional to 247,987.20, 371,980.80 and 164,006.40 is: 246,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,987.20 : 371,980.80 = 164,006.40 : x
  2. Step 2: Convert to fraction form
    247,987.20/371,980.80 = 164,006.40/x
  3. Step 3: Cross multiply
    247,987.20x = 371,980.80 × 164,006.40
  4. Step 4: Simplify right side
    247,987.20x = 61,007,231,877.12
  5. Step 5: Solve for x
    x = 61,007,231,877.12/247,987.20
  6. Step 6: Final answer
    x = 246,009.60

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1.5x scale

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.