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Finding the Fourth Proportional to 1,287,739.04, 1,931,608.56 and 489,020.67

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Solution

The fourth proportional to 1,287,739.04, 1,931,608.56 and 489,020.67 is: 733,531.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,739.04 : 1,931,608.56 = 489,020.67 : x
  2. Step 2: Convert to fraction form
    1,287,739.04/1,931,608.56 = 489,020.67/x
  3. Step 3: Cross multiply
    1,287,739.04x = 1,931,608.56 × 489,020.67
  4. Step 4: Simplify right side
    1,287,739.04x = 944,596,512,188.94
  5. Step 5: Solve for x
    x = 944,596,512,188.94/1,287,739.04
  6. Step 6: Final answer
    x = 733,531.01

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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.