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Finding the Fourth Proportional to 719,107.81, 992,362.52 and 392,427.28

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Solution

The fourth proportional to 719,107.81, 992,362.52 and 392,427.28 is: 541,546.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,107.81 : 992,362.52 = 392,427.28 : x
  2. Step 2: Convert to fraction form
    719,107.81/992,362.52 = 392,427.28/x
  3. Step 3: Cross multiply
    719,107.81x = 992,362.52 × 392,427.28
  4. Step 4: Simplify right side
    719,107.81x = 389,430,126,719.07
  5. Step 5: Solve for x
    x = 389,430,126,719.07/719,107.81
  6. Step 6: Final answer
    x = 541,546.24

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Double scale
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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.