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Finding the Fourth Proportional to 347,716.40, 521,574.60 and 331,386.80

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Solution

The fourth proportional to 347,716.40, 521,574.60 and 331,386.80 is: 497,080.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,716.40 : 521,574.60 = 331,386.80 : x
  2. Step 2: Convert to fraction form
    347,716.40/521,574.60 = 331,386.80/x
  3. Step 3: Cross multiply
    347,716.40x = 521,574.60 × 331,386.80
  4. Step 4: Simplify right side
    347,716.40x = 172,842,937,655.28
  5. Step 5: Solve for x
    x = 172,842,937,655.28/347,716.40
  6. Step 6: Final answer
    x = 497,080.20

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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.