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Finding the Fourth Proportional to 1,399,440.22, 1,931,823.36 and 940,820.78

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Solution

The fourth proportional to 1,399,440.22, 1,931,823.36 and 940,820.78 is: 1,298,733.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,440.22 : 1,931,823.36 = 940,820.78 : x
  2. Step 2: Convert to fraction form
    1,399,440.22/1,931,823.36 = 940,820.78/x
  3. Step 3: Cross multiply
    1,399,440.22x = 1,931,823.36 × 940,820.78
  4. Step 4: Simplify right side
    1,399,440.22x = 1,817,499,565,206.98
  5. Step 5: Solve for x
    x = 1,817,499,565,206.98/1,399,440.22
  6. Step 6: Final answer
    x = 1,298,733.27

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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.