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Finding the Fourth Proportional to 521,901.11, 720,211.29 and 307,054.98

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Solution

The fourth proportional to 521,901.11, 720,211.29 and 307,054.98 is: 423,728.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,901.11 : 720,211.29 = 307,054.98 : x
  2. Step 2: Convert to fraction form
    521,901.11/720,211.29 = 307,054.98/x
  3. Step 3: Cross multiply
    521,901.11x = 720,211.29 × 307,054.98
  4. Step 4: Simplify right side
    521,901.11x = 221,144,463,246.72
  5. Step 5: Solve for x
    x = 221,144,463,246.72/521,901.11
  6. Step 6: Final answer
    x = 423,728.67

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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.