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Finding the Fourth Proportional to 643,327.80, 887,775.21 and 371,386.50

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Solution

The fourth proportional to 643,327.80, 887,775.21 and 371,386.50 is: 512,503.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,327.80 : 887,775.21 = 371,386.50 : x
  2. Step 2: Convert to fraction form
    643,327.80/887,775.21 = 371,386.50/x
  3. Step 3: Cross multiply
    643,327.80x = 887,775.21 × 371,386.50
  4. Step 4: Simplify right side
    643,327.80x = 329,707,728,028.67
  5. Step 5: Solve for x
    x = 329,707,728,028.67/643,327.80
  6. Step 6: Final answer
    x = 512,503.47

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1.5x scale

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.