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Finding the Fourth Proportional to 373,542.12, 515,532.40 and 212,421.40

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Solution

The fourth proportional to 373,542.12, 515,532.40 and 212,421.40 is: 293,166.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,542.12 : 515,532.40 = 212,421.40 : x
  2. Step 2: Convert to fraction form
    373,542.12/515,532.40 = 212,421.40/x
  3. Step 3: Cross multiply
    373,542.12x = 515,532.40 × 212,421.40
  4. Step 4: Simplify right side
    373,542.12x = 109,510,114,153.36
  5. Step 5: Solve for x
    x = 109,510,114,153.36/373,542.12
  6. Step 6: Final answer
    x = 293,166.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.