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Finding the Fourth Proportional to 643,591.40, 888,328.42 and 401,728.36

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Solution

The fourth proportional to 643,591.40, 888,328.42 and 401,728.36 is: 554,492.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,591.40 : 888,328.42 = 401,728.36 : x
  2. Step 2: Convert to fraction form
    643,591.40/888,328.42 = 401,728.36/x
  3. Step 3: Cross multiply
    643,591.40x = 888,328.42 × 401,728.36
  4. Step 4: Simplify right side
    643,591.40x = 356,866,719,307.99
  5. Step 5: Solve for x
    x = 356,866,719,307.99/643,591.40
  6. Step 6: Final answer
    x = 554,492.68

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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.