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Finding the Fourth Proportional to 992,978.65, 1,489,059.73 and 393,857.29

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Solution

The fourth proportional to 992,978.65, 1,489,059.73 and 393,857.29 is: 590,624.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    992,978.65 : 1,489,059.73 = 393,857.29 : x
  2. Step 2: Convert to fraction form
    992,978.65/1,489,059.73 = 393,857.29/x
  3. Step 3: Cross multiply
    992,978.65x = 1,489,059.73 × 393,857.29
  4. Step 4: Simplify right side
    992,978.65x = 586,477,029,905.93
  5. Step 5: Solve for x
    x = 586,477,029,905.93/992,978.65
  6. Step 6: Final answer
    x = 590,624.01

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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.