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Finding the Fourth Proportional to 719,346.65, 992,698.47 and 397,056.83

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Solution

The fourth proportional to 719,346.65, 992,698.47 and 397,056.83 is: 547,938.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,346.65 : 992,698.47 = 397,056.83 : x
  2. Step 2: Convert to fraction form
    719,346.65/992,698.47 = 397,056.83/x
  3. Step 3: Cross multiply
    719,346.65x = 992,698.47 × 397,056.83
  4. Step 4: Simplify right side
    719,346.65x = 394,157,705,658.77
  5. Step 5: Solve for x
    x = 394,157,705,658.77/719,346.65
  6. Step 6: Final answer
    x = 547,938.47

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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.