Home / 857,081.27-1,284,715.47-316,990.45

Finding the Fourth Proportional to 857,081.27, 1,284,715.47 and 316,990.45

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Solution

The fourth proportional to 857,081.27, 1,284,715.47 and 316,990.45 is: 475,150.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,081.27 : 1,284,715.47 = 316,990.45 : x
  2. Step 2: Convert to fraction form
    857,081.27/1,284,715.47 = 316,990.45/x
  3. Step 3: Cross multiply
    857,081.27x = 1,284,715.47 × 316,990.45
  4. Step 4: Simplify right side
    857,081.27x = 407,242,534,957.26
  5. Step 5: Solve for x
    x = 407,242,534,957.26/857,081.27
  6. Step 6: Final answer
    x = 475,150.43

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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.