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Finding the Fourth Proportional to 788,590.40, 1,183,760.40 and 489,408.80

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Solution

The fourth proportional to 788,590.40, 1,183,760.40 and 489,408.80 is: 734,656.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,590.40 : 1,183,760.40 = 489,408.80 : x
  2. Step 2: Convert to fraction form
    788,590.40/1,183,760.40 = 489,408.80/x
  3. Step 3: Cross multiply
    788,590.40x = 1,183,760.40 × 489,408.80
  4. Step 4: Simplify right side
    788,590.40x = 579,342,756,851.52
  5. Step 5: Solve for x
    x = 579,342,756,851.52/788,590.40
  6. Step 6: Final answer
    x = 734,656.11

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1.5x scale

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.