Home / 1,286,615.40-1,929,339.90-487,631.40

Finding the Fourth Proportional to 1,286,615.40, 1,929,339.90 and 487,631.40

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Solution

The fourth proportional to 1,286,615.40, 1,929,339.90 and 487,631.40 is: 731,226.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286,615.40 : 1,929,339.90 = 487,631.40 : x
  2. Step 2: Convert to fraction form
    1,286,615.40/1,929,339.90 = 487,631.40/x
  3. Step 3: Cross multiply
    1,286,615.40x = 1,929,339.90 × 487,631.40
  4. Step 4: Simplify right side
    1,286,615.40x = 940,806,716,512.86
  5. Step 5: Solve for x
    x = 940,806,716,512.86/1,286,615.40
  6. Step 6: Final answer
    x = 731,226.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.