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Finding the Fourth Proportional to 2,978,125.92, 4,109,795.28 and 1,620,004.32

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Solution

The fourth proportional to 2,978,125.92, 4,109,795.28 and 1,620,004.32 is: 2,235,595.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,978,125.92 : 4,109,795.28 = 1,620,004.32 : x
  2. Step 2: Convert to fraction form
    2,978,125.92/4,109,795.28 = 1,620,004.32/x
  3. Step 3: Cross multiply
    2,978,125.92x = 4,109,795.28 × 1,620,004.32
  4. Step 4: Simplify right side
    2,978,125.92x = 6,657,886,107,915.61
  5. Step 5: Solve for x
    x = 6,657,886,107,915.61/2,978,125.92
  6. Step 6: Final answer
    x = 2,235,595.90

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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.