Home / 831,740.80-1,247,611.20-660,498.70

Finding the Fourth Proportional to 831,740.80, 1,247,611.20 and 660,498.70

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Solution

The fourth proportional to 831,740.80, 1,247,611.20 and 660,498.70 is: 990,748.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    831,740.80 : 1,247,611.20 = 660,498.70 : x
  2. Step 2: Convert to fraction form
    831,740.80/1,247,611.20 = 660,498.70/x
  3. Step 3: Cross multiply
    831,740.80x = 1,247,611.20 × 660,498.70
  4. Step 4: Simplify right side
    831,740.80x = 824,045,575,705.44
  5. Step 5: Solve for x
    x = 824,045,575,705.44/831,740.80
  6. Step 6: Final answer
    x = 990,748.05

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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.