Home / 712,838.82-983,717.55-390,561.12

Finding the Fourth Proportional to 712,838.82, 983,717.55 and 390,561.12

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Solution

The fourth proportional to 712,838.82, 983,717.55 and 390,561.12 is: 538,974.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,838.82 : 983,717.55 = 390,561.12 : x
  2. Step 2: Convert to fraction form
    712,838.82/983,717.55 = 390,561.12/x
  3. Step 3: Cross multiply
    712,838.82x = 983,717.55 × 390,561.12
  4. Step 4: Simplify right side
    712,838.82x = 384,201,828,091.66
  5. Step 5: Solve for x
    x = 384,201,828,091.66/712,838.82
  6. Step 6: Final answer
    x = 538,974.33

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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.