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Finding the Fourth Proportional to 560,003.11, 840,007.70 and 139,278.98

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Solution

The fourth proportional to 560,003.11, 840,007.70 and 139,278.98 is: 208,919.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,003.11 : 840,007.70 = 139,278.98 : x
  2. Step 2: Convert to fraction form
    560,003.11/840,007.70 = 139,278.98/x
  3. Step 3: Cross multiply
    560,003.11x = 840,007.70 × 139,278.98
  4. Step 4: Simplify right side
    560,003.11x = 116,995,415,648.15
  5. Step 5: Solve for x
    x = 116,995,415,648.15/560,003.11
  6. Step 6: Final answer
    x = 208,919.22

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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.