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Finding the Fourth Proportional to 530,389.80, 731,937.94 and 288,674.15

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Solution

The fourth proportional to 530,389.80, 731,937.94 and 288,674.15 is: 398,370.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,389.80 : 731,937.94 = 288,674.15 : x
  2. Step 2: Convert to fraction form
    530,389.80/731,937.94 = 288,674.15/x
  3. Step 3: Cross multiply
    530,389.80x = 731,937.94 × 288,674.15
  4. Step 4: Simplify right side
    530,389.80x = 211,291,558,300.88
  5. Step 5: Solve for x
    x = 211,291,558,300.88/530,389.80
  6. Step 6: Final answer
    x = 398,370.33

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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.