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Finding the Fourth Proportional to 292,503.40, 438,755.10 and 82,148.20

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Solution

The fourth proportional to 292,503.40, 438,755.10 and 82,148.20 is: 123,222.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,503.40 : 438,755.10 = 82,148.20 : x
  2. Step 2: Convert to fraction form
    292,503.40/438,755.10 = 82,148.20/x
  3. Step 3: Cross multiply
    292,503.40x = 438,755.10 × 82,148.20
  4. Step 4: Simplify right side
    292,503.40x = 36,042,941,705.82
  5. Step 5: Solve for x
    x = 36,042,941,705.82/292,503.40
  6. Step 6: Final answer
    x = 123,222.30

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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.