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Finding the Fourth Proportional to 643,202.17, 887,648.63 and 356,705.17

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Solution

The fourth proportional to 643,202.17, 887,648.63 and 356,705.17 is: 492,269.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,202.17 : 887,648.63 = 356,705.17 : x
  2. Step 2: Convert to fraction form
    643,202.17/887,648.63 = 356,705.17/x
  3. Step 3: Cross multiply
    643,202.17x = 887,648.63 × 356,705.17
  4. Step 4: Simplify right side
    643,202.17x = 316,628,851,461.77
  5. Step 5: Solve for x
    x = 316,628,851,461.77/643,202.17
  6. Step 6: Final answer
    x = 492,269.57

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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.