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Finding the Fourth Proportional to 710,197.60, 980,067.69 and 387,907.78

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Solution

The fourth proportional to 710,197.60, 980,067.69 and 387,907.78 is: 535,310.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,197.60 : 980,067.69 = 387,907.78 : x
  2. Step 2: Convert to fraction form
    710,197.60/980,067.69 = 387,907.78/x
  3. Step 3: Cross multiply
    710,197.60x = 980,067.69 × 387,907.78
  4. Step 4: Simplify right side
    710,197.60x = 380,175,881,877.63
  5. Step 5: Solve for x
    x = 380,175,881,877.63/710,197.60
  6. Step 6: Final answer
    x = 535,310.01

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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.