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Finding the Fourth Proportional to 292,221.20, 438,299.40 and 239,538.80

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Solution

The fourth proportional to 292,221.20, 438,299.40 and 239,538.80 is: 359,281.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,221.20 : 438,299.40 = 239,538.80 : x
  2. Step 2: Convert to fraction form
    292,221.20/438,299.40 = 239,538.80/x
  3. Step 3: Cross multiply
    292,221.20x = 438,299.40 × 239,538.80
  4. Step 4: Simplify right side
    292,221.20x = 104,989,712,316.72
  5. Step 5: Solve for x
    x = 104,989,712,316.72/292,221.20
  6. Step 6: Final answer
    x = 359,281.64

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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.