Home / 643,427.59-887,931.12-356,947.68

Finding the Fourth Proportional to 643,427.59, 887,931.12 and 356,947.68

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Solution

The fourth proportional to 643,427.59, 887,931.12 and 356,947.68 is: 492,588.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,427.59 : 887,931.12 = 356,947.68 : x
  2. Step 2: Convert to fraction form
    643,427.59/887,931.12 = 356,947.68/x
  3. Step 3: Cross multiply
    643,427.59x = 887,931.12 × 356,947.68
  4. Step 4: Simplify right side
    643,427.59x = 316,944,953,283.80
  5. Step 5: Solve for x
    x = 316,944,953,283.80/643,427.59
  6. Step 6: Final answer
    x = 492,588.38

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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.