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Finding the Fourth Proportional to 978,188.78, 1,349,914.29 and 590,950.36

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Solution

The fourth proportional to 978,188.78, 1,349,914.29 and 590,950.36 is: 815,519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,188.78 : 1,349,914.29 = 590,950.36 : x
  2. Step 2: Convert to fraction form
    978,188.78/1,349,914.29 = 590,950.36/x
  3. Step 3: Cross multiply
    978,188.78x = 1,349,914.29 × 590,950.36
  4. Step 4: Simplify right side
    978,188.78x = 797,732,338,440.07
  5. Step 5: Solve for x
    x = 797,732,338,440.07/978,188.78
  6. Step 6: Final answer
    x = 815,519.82

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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.