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Finding the Fourth Proportional to 643,591.52, 888,156.29 and 357,157.70

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Solution

The fourth proportional to 643,591.52, 888,156.29 and 357,157.70 is: 492,877.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,591.52 : 888,156.29 = 357,157.70 : x
  2. Step 2: Convert to fraction form
    643,591.52/888,156.29 = 357,157.70/x
  3. Step 3: Cross multiply
    643,591.52x = 888,156.29 × 357,157.70
  4. Step 4: Simplify right side
    643,591.52x = 317,211,862,555.51
  5. Step 5: Solve for x
    x = 317,211,862,555.51/643,591.52
  6. Step 6: Final answer
    x = 492,877.63

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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.