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Finding the Fourth Proportional to 704,860.40, 972,696.87 and 398,994.80

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Solution

The fourth proportional to 704,860.40, 972,696.87 and 398,994.80 is: 550,606.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,860.40 : 972,696.87 = 398,994.80 : x
  2. Step 2: Convert to fraction form
    704,860.40/972,696.87 = 398,994.80/x
  3. Step 3: Cross multiply
    704,860.40x = 972,696.87 × 398,994.80
  4. Step 4: Simplify right side
    704,860.40x = 388,100,988,242.79
  5. Step 5: Solve for x
    x = 388,100,988,242.79/704,860.40
  6. Step 6: Final answer
    x = 550,606.88

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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.