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Finding the Fourth Proportional to 643,459.95, 888,081.03 and 357,072.30

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Solution

The fourth proportional to 643,459.95, 888,081.03 and 357,072.30 is: 492,818.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,459.95 : 888,081.03 = 357,072.30 : x
  2. Step 2: Convert to fraction form
    643,459.95/888,081.03 = 357,072.30/x
  3. Step 3: Cross multiply
    643,459.95x = 888,081.03 × 357,072.30
  4. Step 4: Simplify right side
    643,459.95x = 317,109,135,968.47
  5. Step 5: Solve for x
    x = 317,109,135,968.47/643,459.95
  6. Step 6: Final answer
    x = 492,818.76

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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.