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Finding the Fourth Proportional to 530,398.53, 731,967.93 and 288,689.88

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Solution

The fourth proportional to 530,398.53, 731,967.93 and 288,689.88 is: 398,401.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,398.53 : 731,967.93 = 288,689.88 : x
  2. Step 2: Convert to fraction form
    530,398.53/731,967.93 = 288,689.88/x
  3. Step 3: Cross multiply
    530,398.53x = 731,967.93 × 288,689.88
  4. Step 4: Simplify right side
    530,398.53x = 211,311,733,875.55
  5. Step 5: Solve for x
    x = 211,311,733,875.55/530,398.53
  6. Step 6: Final answer
    x = 398,401.81

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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.