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Finding the Fourth Proportional to 647,574.50, 893,652.81 and 379,302.50

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Solution

The fourth proportional to 647,574.50, 893,652.81 and 379,302.50 is: 523,437.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,574.50 : 893,652.81 = 379,302.50 : x
  2. Step 2: Convert to fraction form
    647,574.50/893,652.81 = 379,302.50/x
  3. Step 3: Cross multiply
    647,574.50x = 893,652.81 × 379,302.50
  4. Step 4: Simplify right side
    647,574.50x = 338,964,744,965.03
  5. Step 5: Solve for x
    x = 338,964,744,965.03/647,574.50
  6. Step 6: Final answer
    x = 523,437.45

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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.