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Finding the Fourth Proportional to 704,860.91, 972,697.56 and 398,995.30

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Solution

The fourth proportional to 704,860.91, 972,697.56 and 398,995.30 is: 550,607.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,860.91 : 972,697.56 = 398,995.30 : x
  2. Step 2: Convert to fraction form
    704,860.91/972,697.56 = 398,995.30/x
  3. Step 3: Cross multiply
    704,860.91x = 972,697.56 × 398,995.30
  4. Step 4: Simplify right side
    704,860.91x = 388,101,749,897.98
  5. Step 5: Solve for x
    x = 388,101,749,897.98/704,860.91
  6. Step 6: Final answer
    x = 550,607.57

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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.