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Finding the Fourth Proportional to 371,421.80, 557,132.70 and 347,802.20

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Solution

The fourth proportional to 371,421.80, 557,132.70 and 347,802.20 is: 521,703.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,421.80 : 557,132.70 = 347,802.20 : x
  2. Step 2: Convert to fraction form
    371,421.80/557,132.70 = 347,802.20/x
  3. Step 3: Cross multiply
    371,421.80x = 557,132.70 × 347,802.20
  4. Step 4: Simplify right side
    371,421.80x = 193,771,978,751.94
  5. Step 5: Solve for x
    x = 193,771,978,751.94/371,421.80
  6. Step 6: Final answer
    x = 521,703.30

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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.