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Finding the Fourth Proportional to 292,820.80, 439,231.20 and 198,342.40

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Solution

The fourth proportional to 292,820.80, 439,231.20 and 198,342.40 is: 297,513.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,820.80 : 439,231.20 = 198,342.40 : x
  2. Step 2: Convert to fraction form
    292,820.80/439,231.20 = 198,342.40/x
  3. Step 3: Cross multiply
    292,820.80x = 439,231.20 × 198,342.40
  4. Step 4: Simplify right side
    292,820.80x = 87,118,170,362.88
  5. Step 5: Solve for x
    x = 87,118,170,362.88/292,820.80
  6. Step 6: Final answer
    x = 297,513.60

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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.