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Finding the Fourth Proportional to 1,890,621.32, 2,834,478.30 and 978,826.32

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Solution

The fourth proportional to 1,890,621.32, 2,834,478.30 and 978,826.32 is: 1,467,486.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890,621.32 : 2,834,478.30 = 978,826.32 : x
  2. Step 2: Convert to fraction form
    1,890,621.32/2,834,478.30 = 978,826.32/x
  3. Step 3: Cross multiply
    1,890,621.32x = 2,834,478.30 × 978,826.32
  4. Step 4: Simplify right side
    1,890,621.32x = 2,774,461,963,508.86
  5. Step 5: Solve for x
    x = 2,774,461,963,508.86/1,890,621.32
  6. Step 6: Final answer
    x = 1,467,486.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.