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Finding the Fourth Proportional to 647,335.19, 893,427.78 and 389,472.77

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Solution

The fourth proportional to 647,335.19, 893,427.78 and 389,472.77 is: 537,535.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,335.19 : 893,427.78 = 389,472.77 : x
  2. Step 2: Convert to fraction form
    647,335.19/893,427.78 = 389,472.77/x
  3. Step 3: Cross multiply
    647,335.19x = 893,427.78 × 389,472.77
  4. Step 4: Simplify right side
    647,335.19x = 347,965,787,804.41
  5. Step 5: Solve for x
    x = 347,965,787,804.41/647,335.19
  6. Step 6: Final answer
    x = 537,535.72

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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.