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Finding the Fourth Proportional to 292,308.40, 438,430.20 and 81,967.60

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Solution

The fourth proportional to 292,308.40, 438,430.20 and 81,967.60 is: 122,942.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,308.40 : 438,430.20 = 81,967.60 : x
  2. Step 2: Convert to fraction form
    292,308.40/438,430.20 = 81,967.60/x
  3. Step 3: Cross multiply
    292,308.40x = 438,430.20 × 81,967.60
  4. Step 4: Simplify right side
    292,308.40x = 35,937,071,261.52
  5. Step 5: Solve for x
    x = 35,937,071,261.52/292,308.40
  6. Step 6: Final answer
    x = 122,942.31

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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.