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Finding the Fourth Proportional to 708,805.51, 978,116.08 and 402,841.46

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Solution

The fourth proportional to 708,805.51, 978,116.08 and 402,841.46 is: 555,901.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,805.51 : 978,116.08 = 402,841.46 : x
  2. Step 2: Convert to fraction form
    708,805.51/978,116.08 = 402,841.46/x
  3. Step 3: Cross multiply
    708,805.51x = 978,116.08 × 402,841.46
  4. Step 4: Simplify right side
    708,805.51x = 394,025,709,716.68
  5. Step 5: Solve for x
    x = 394,025,709,716.68/708,805.51
  6. Step 6: Final answer
    x = 555,901.03

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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.