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Finding the Fourth Proportional to 530,410.68, 731,969.79 and 288,692.67

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Solution

The fourth proportional to 530,410.68, 731,969.79 and 288,692.67 is: 398,397.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,410.68 : 731,969.79 = 288,692.67 : x
  2. Step 2: Convert to fraction form
    530,410.68/731,969.79 = 288,692.67/x
  3. Step 3: Cross multiply
    530,410.68x = 731,969.79 × 288,692.67
  4. Step 4: Simplify right side
    530,410.68x = 211,314,313,034.44
  5. Step 5: Solve for x
    x = 211,314,313,034.44/530,410.68
  6. Step 6: Final answer
    x = 398,397.55

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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.