Home / 712,597.20-983,383.92-390,327.36

Finding the Fourth Proportional to 712,597.20, 983,383.92 and 390,327.36

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Solution

The fourth proportional to 712,597.20, 983,383.92 and 390,327.36 is: 538,651.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,597.20 : 983,383.92 = 390,327.36 : x
  2. Step 2: Convert to fraction form
    712,597.20/983,383.92 = 390,327.36/x
  3. Step 3: Cross multiply
    712,597.20x = 983,383.92 × 390,327.36
  4. Step 4: Simplify right side
    712,597.20x = 383,841,649,360.05
  5. Step 5: Solve for x
    x = 383,841,649,360.05/712,597.20
  6. Step 6: Final answer
    x = 538,651.64

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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.