Home / 770,400.90-1,155,929.40-486,309.60

Finding the Fourth Proportional to 770,400.90, 1,155,929.40 and 486,309.60

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Solution

The fourth proportional to 770,400.90, 1,155,929.40 and 486,309.60 is: 729,671.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,400.90 : 1,155,929.40 = 486,309.60 : x
  2. Step 2: Convert to fraction form
    770,400.90/1,155,929.40 = 486,309.60/x
  3. Step 3: Cross multiply
    770,400.90x = 1,155,929.40 × 486,309.60
  4. Step 4: Simplify right side
    770,400.90x = 562,139,564,142.24
  5. Step 5: Solve for x
    x = 562,139,564,142.24/770,400.90
  6. Step 6: Final answer
    x = 729,671.48

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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.