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Finding the Fourth Proportional to 719,156.70, 992,460.08 and 392,487.60

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Solution

The fourth proportional to 719,156.70, 992,460.08 and 392,487.60 is: 541,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,156.70 : 992,460.08 = 392,487.60 : x
  2. Step 2: Convert to fraction form
    719,156.70/992,460.08 = 392,487.60/x
  3. Step 3: Cross multiply
    719,156.70x = 992,460.08 × 392,487.60
  4. Step 4: Simplify right side
    719,156.70x = 389,528,270,913.93
  5. Step 5: Solve for x
    x = 389,528,270,913.93/719,156.70
  6. Step 6: Final answer
    x = 541,645.89

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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.