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Finding the Fourth Proportional to 530,340.19, 731,855.42 and 288,617.56

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Solution

The fourth proportional to 530,340.19, 731,855.42 and 288,617.56 is: 398,284.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,340.19 : 731,855.42 = 288,617.56 : x
  2. Step 2: Convert to fraction form
    530,340.19/731,855.42 = 288,617.56/x
  3. Step 3: Cross multiply
    530,340.19x = 731,855.42 × 288,617.56
  4. Step 4: Simplify right side
    530,340.19x = 211,226,325,593.18
  5. Step 5: Solve for x
    x = 211,226,325,593.18/530,340.19
  6. Step 6: Final answer
    x = 398,284.59

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1.5x scale

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.