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Finding the Fourth Proportional to 528,009.40, 791,819.70 and 261,681.40

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Solution

The fourth proportional to 528,009.40, 791,819.70 and 261,681.40 is: 392,425.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,009.40 : 791,819.70 = 261,681.40 : x
  2. Step 2: Convert to fraction form
    528,009.40/791,819.70 = 261,681.40/x
  3. Step 3: Cross multiply
    528,009.40x = 791,819.70 × 261,681.40
  4. Step 4: Simplify right side
    528,009.40x = 207,204,487,643.58
  5. Step 5: Solve for x
    x = 207,204,487,643.58/528,009.40
  6. Step 6: Final answer
    x = 392,425.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.