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Finding the Fourth Proportional to 1,660,865.70, 2,291,994.65 and 896,919.20

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Solution

The fourth proportional to 1,660,865.70, 2,291,994.65 and 896,919.20 is: 1,237,748.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660,865.70 : 2,291,994.65 = 896,919.20 : x
  2. Step 2: Convert to fraction form
    1,660,865.70/2,291,994.65 = 896,919.20/x
  3. Step 3: Cross multiply
    1,660,865.70x = 2,291,994.65 × 896,919.20
  4. Step 4: Simplify right side
    1,660,865.70x = 2,055,733,991,937.71
  5. Step 5: Solve for x
    x = 2,055,733,991,937.71/1,660,865.70
  6. Step 6: Final answer
    x = 1,237,748.48

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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.