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Finding the Fourth Proportional to 643,214.68, 887,690.73 and 356,827

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Solution

The fourth proportional to 643,214.68, 887,690.73 and 356,827 is: 492,451.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,214.68 : 887,690.73 = 356,827 : x
  2. Step 2: Convert to fraction form
    643,214.68/887,690.73 = 356,827/x
  3. Step 3: Cross multiply
    643,214.68x = 887,690.73 × 356,827
  4. Step 4: Simplify right side
    643,214.68x = 316,752,020,113.71
  5. Step 5: Solve for x
    x = 316,752,020,113.71/643,214.68
  6. Step 6: Final answer
    x = 492,451.48

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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.