Home / 770,660.80-1,155,991.20-487,225.60

Finding the Fourth Proportional to 770,660.80, 1,155,991.20 and 487,225.60

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Solution

The fourth proportional to 770,660.80, 1,155,991.20 and 487,225.60 is: 730,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    770,660.80 : 1,155,991.20 = 487,225.60 : x
  2. Step 2: Convert to fraction form
    770,660.80/1,155,991.20 = 487,225.60/x
  3. Step 3: Cross multiply
    770,660.80x = 1,155,991.20 × 487,225.60
  4. Step 4: Simplify right side
    770,660.80x = 563,228,506,014.72
  5. Step 5: Solve for x
    x = 563,228,506,014.72/770,660.80
  6. Step 6: Final answer
    x = 730,838.40

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Double scale
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Similar ratio
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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.