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Finding the Fourth Proportional to 704,859.60, 972,661.95 and 398,998.06

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Solution

The fourth proportional to 704,859.60, 972,661.95 and 398,998.06 is: 550,592.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,859.60 : 972,661.95 = 398,998.06 : x
  2. Step 2: Convert to fraction form
    704,859.60/972,661.95 = 398,998.06/x
  3. Step 3: Cross multiply
    704,859.60x = 972,661.95 × 398,998.06
  4. Step 4: Simplify right side
    704,859.60x = 388,090,231,085.82
  5. Step 5: Solve for x
    x = 388,090,231,085.82/704,859.60
  6. Step 6: Final answer
    x = 550,592.25

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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.