Home / 1,288,256.40-1,931,801.40-489,272.40

Finding the Fourth Proportional to 1,288,256.40, 1,931,801.40 and 489,272.40

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Solution

The fourth proportional to 1,288,256.40, 1,931,801.40 and 489,272.40 is: 733,687.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288,256.40 : 1,931,801.40 = 489,272.40 : x
  2. Step 2: Convert to fraction form
    1,288,256.40/1,931,801.40 = 489,272.40/x
  3. Step 3: Cross multiply
    1,288,256.40x = 1,931,801.40 × 489,272.40
  4. Step 4: Simplify right side
    1,288,256.40x = 945,177,107,301.36
  5. Step 5: Solve for x
    x = 945,177,107,301.36/1,288,256.40
  6. Step 6: Final answer
    x = 733,687.10

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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.