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Finding the Fourth Proportional to 353,353.78, 530,030.67 and 143,139.34

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Solution

The fourth proportional to 353,353.78, 530,030.67 and 143,139.34 is: 214,709.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,353.78 : 530,030.67 = 143,139.34 : x
  2. Step 2: Convert to fraction form
    353,353.78/530,030.67 = 143,139.34/x
  3. Step 3: Cross multiply
    353,353.78x = 530,030.67 × 143,139.34
  4. Step 4: Simplify right side
    353,353.78x = 75,868,240,283.56
  5. Step 5: Solve for x
    x = 75,868,240,283.56/353,353.78
  6. Step 6: Final answer
    x = 214,709.01

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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.