Home / 1,288,129.40-1,931,610.90-489,145.40

Finding the Fourth Proportional to 1,288,129.40, 1,931,610.90 and 489,145.40

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Solution

The fourth proportional to 1,288,129.40, 1,931,610.90 and 489,145.40 is: 733,496.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,129.40 : 1,931,610.90 = 489,145.40 : x
  2. Step 2: Convert to fraction form
    1,288,129.40/1,931,610.90 = 489,145.40/x
  3. Step 3: Cross multiply
    1,288,129.40x = 1,931,610.90 × 489,145.40
  4. Step 4: Simplify right side
    1,288,129.40x = 944,838,586,324.86
  5. Step 5: Solve for x
    x = 944,838,586,324.86/1,288,129.40
  6. Step 6: Final answer
    x = 733,496.64

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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.