Home / 712,841.82-983,721.69-390,564.12

Finding the Fourth Proportional to 712,841.82, 983,721.69 and 390,564.12

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Solution

The fourth proportional to 712,841.82, 983,721.69 and 390,564.12 is: 538,978.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,841.82 : 983,721.69 = 390,564.12 : x
  2. Step 2: Convert to fraction form
    712,841.82/983,721.69 = 390,564.12/x
  3. Step 3: Cross multiply
    712,841.82x = 983,721.69 × 390,564.12
  4. Step 4: Simplify right side
    712,841.82x = 384,206,396,179.76
  5. Step 5: Solve for x
    x = 384,206,396,179.76/712,841.82
  6. Step 6: Final answer
    x = 538,978.47

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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.