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Finding the Fourth Proportional to 719,351.40, 992,728.98 and 392,683.80

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Solution

The fourth proportional to 719,351.40, 992,728.98 and 392,683.80 is: 541,916.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,351.40 : 992,728.98 = 392,683.80 : x
  2. Step 2: Convert to fraction form
    719,351.40/992,728.98 = 392,683.80/x
  3. Step 3: Cross multiply
    719,351.40x = 992,728.98 × 392,683.80
  4. Step 4: Simplify right side
    719,351.40x = 389,828,588,236.52
  5. Step 5: Solve for x
    x = 389,828,588,236.52/719,351.40
  6. Step 6: Final answer
    x = 541,916.77

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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.