Home / 643,425.09-887,927.67-356,945.18

Finding the Fourth Proportional to 643,425.09, 887,927.67 and 356,945.18

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Solution

The fourth proportional to 643,425.09, 887,927.67 and 356,945.18 is: 492,584.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,425.09 : 887,927.67 = 356,945.18 : x
  2. Step 2: Convert to fraction form
    643,425.09/887,927.67 = 356,945.18/x
  3. Step 3: Cross multiply
    643,425.09x = 887,927.67 × 356,945.18
  4. Step 4: Simplify right side
    643,425.09x = 316,941,500,885.22
  5. Step 5: Solve for x
    x = 316,941,500,885.22/643,425.09
  6. Step 6: Final answer
    x = 492,584.93

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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.