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Finding the Fourth Proportional to 292,315.40, 438,440.70 and 81,974.60

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Solution

The fourth proportional to 292,315.40, 438,440.70 and 81,974.60 is: 122,952.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,315.40 : 438,440.70 = 81,974.60 : x
  2. Step 2: Convert to fraction form
    292,315.40/438,440.70 = 81,974.60/x
  3. Step 3: Cross multiply
    292,315.40x = 438,440.70 × 81,974.60
  4. Step 4: Simplify right side
    292,315.40x = 35,941,001,006.22
  5. Step 5: Solve for x
    x = 35,941,001,006.22/292,315.40
  6. Step 6: Final answer
    x = 122,952.81

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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.