Home / 712,835.20-983,713.40-390,565.92

Finding the Fourth Proportional to 712,835.20, 983,713.40 and 390,565.92

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Solution

The fourth proportional to 712,835.20, 983,713.40 and 390,565.92 is: 538,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,835.20 : 983,713.40 = 390,565.92 : x
  2. Step 2: Convert to fraction form
    712,835.20/983,713.40 = 390,565.92/x
  3. Step 3: Cross multiply
    712,835.20x = 983,713.40 × 390,565.92
  4. Step 4: Simplify right side
    712,835.20x = 384,204,929,087.33
  5. Step 5: Solve for x
    x = 384,204,929,087.33/712,835.20
  6. Step 6: Final answer
    x = 538,981.42

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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.