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Finding the Fourth Proportional to 551,969.40, 761,708.70 and 306,944.40

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Solution

The fourth proportional to 551,969.40, 761,708.70 and 306,944.40 is: 423,578.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,969.40 : 761,708.70 = 306,944.40 : x
  2. Step 2: Convert to fraction form
    551,969.40/761,708.70 = 306,944.40/x
  3. Step 3: Cross multiply
    551,969.40x = 761,708.70 × 306,944.40
  4. Step 4: Simplify right side
    551,969.40x = 233,802,219,896.28
  5. Step 5: Solve for x
    x = 233,802,219,896.28/551,969.40
  6. Step 6: Final answer
    x = 423,578.23

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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.