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Finding the Fourth Proportional to 710,216.40, 980,092.14 and 387,926.40

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Solution

The fourth proportional to 710,216.40, 980,092.14 and 387,926.40 is: 535,334.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,216.40 : 980,092.14 = 387,926.40 : x
  2. Step 2: Convert to fraction form
    710,216.40/980,092.14 = 387,926.40/x
  3. Step 3: Cross multiply
    710,216.40x = 980,092.14 × 387,926.40
  4. Step 4: Simplify right side
    710,216.40x = 380,203,615,538.50
  5. Step 5: Solve for x
    x = 380,203,615,538.50/710,216.40
  6. Step 6: Final answer
    x = 535,334.89

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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.