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Finding the Fourth Proportional to 938,894.64, 1,295,639.64 and 556,692.72

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Solution

The fourth proportional to 938,894.64, 1,295,639.64 and 556,692.72 is: 768,215.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,894.64 : 1,295,639.64 = 556,692.72 : x
  2. Step 2: Convert to fraction form
    938,894.64/1,295,639.64 = 556,692.72/x
  3. Step 3: Cross multiply
    938,894.64x = 1,295,639.64 × 556,692.72
  4. Step 4: Simplify right side
    938,894.64x = 721,273,155,331.42
  5. Step 5: Solve for x
    x = 721,273,155,331.42/938,894.64
  6. Step 6: Final answer
    x = 768,215.22

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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.