Home / 712,839.07-983,717.90-390,561.37

Finding the Fourth Proportional to 712,839.07, 983,717.90 and 390,561.37

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Solution

The fourth proportional to 712,839.07, 983,717.90 and 390,561.37 is: 538,974.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,839.07 : 983,717.90 = 390,561.37 : x
  2. Step 2: Convert to fraction form
    712,839.07/983,717.90 = 390,561.37/x
  3. Step 3: Cross multiply
    712,839.07x = 983,717.90 × 390,561.37
  4. Step 4: Simplify right side
    712,839.07x = 384,202,208,764.72
  5. Step 5: Solve for x
    x = 384,202,208,764.72/712,839.07
  6. Step 6: Final answer
    x = 538,974.68

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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.