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Finding the Fourth Proportional to 530,287.58, 731,812.11 and 288,585.45

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Solution

The fourth proportional to 530,287.58, 731,812.11 and 288,585.45 is: 398,256.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,287.58 : 731,812.11 = 288,585.45 : x
  2. Step 2: Convert to fraction form
    530,287.58/731,812.11 = 288,585.45/x
  3. Step 3: Cross multiply
    530,287.58x = 731,812.11 × 288,585.45
  4. Step 4: Simplify right side
    530,287.58x = 211,190,327,079.80
  5. Step 5: Solve for x
    x = 211,190,327,079.80/530,287.58
  6. Step 6: Final answer
    x = 398,256.22

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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.