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Finding the Fourth Proportional to 643,290.48, 887,697.36 and 356,799.60

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Solution

The fourth proportional to 643,290.48, 887,697.36 and 356,799.60 is: 492,359.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,290.48 : 887,697.36 = 356,799.60 : x
  2. Step 2: Convert to fraction form
    643,290.48/887,697.36 = 356,799.60/x
  3. Step 3: Cross multiply
    643,290.48x = 887,697.36 × 356,799.60
  4. Step 4: Simplify right side
    643,290.48x = 316,730,062,969.06
  5. Step 5: Solve for x
    x = 316,730,062,969.06/643,290.48
  6. Step 6: Final answer
    x = 492,359.32

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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.