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Finding the Fourth Proportional to 329,566.80, 494,465.40 and 142,712.40

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Solution

The fourth proportional to 329,566.80, 494,465.40 and 142,712.40 is: 214,118.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,566.80 : 494,465.40 = 142,712.40 : x
  2. Step 2: Convert to fraction form
    329,566.80/494,465.40 = 142,712.40/x
  3. Step 3: Cross multiply
    329,566.80x = 494,465.40 × 142,712.40
  4. Step 4: Simplify right side
    329,566.80x = 70,566,343,950.96
  5. Step 5: Solve for x
    x = 70,566,343,950.96/329,566.80
  6. Step 6: Final answer
    x = 214,118.49

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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.