Home / 768,619.40-1,152,929.10-489,374.60

Finding the Fourth Proportional to 768,619.40, 1,152,929.10 and 489,374.60

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Solution

The fourth proportional to 768,619.40, 1,152,929.10 and 489,374.60 is: 734,061.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,619.40 : 1,152,929.10 = 489,374.60 : x
  2. Step 2: Convert to fraction form
    768,619.40/1,152,929.10 = 489,374.60/x
  3. Step 3: Cross multiply
    768,619.40x = 1,152,929.10 × 489,374.60
  4. Step 4: Simplify right side
    768,619.40x = 564,214,217,140.86
  5. Step 5: Solve for x
    x = 564,214,217,140.86/768,619.40
  6. Step 6: Final answer
    x = 734,061.90

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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.