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Finding the Fourth Proportional to 712,843.82, 983,724.44 and 390,566.12

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Solution

The fourth proportional to 712,843.82, 983,724.44 and 390,566.12 is: 538,981.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,843.82 : 983,724.44 = 390,566.12 : x
  2. Step 2: Convert to fraction form
    712,843.82/983,724.44 = 390,566.12/x
  3. Step 3: Cross multiply
    712,843.82x = 983,724.44 × 390,566.12
  4. Step 4: Simplify right side
    712,843.82x = 384,209,437,679.97
  5. Step 5: Solve for x
    x = 384,209,437,679.97/712,843.82
  6. Step 6: Final answer
    x = 538,981.23

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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.