Home / 891,136.80-1,336,705.20-260,114.40

Finding the Fourth Proportional to 891,136.80, 1,336,705.20 and 260,114.40

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Solution

The fourth proportional to 891,136.80, 1,336,705.20 and 260,114.40 is: 390,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,136.80 : 1,336,705.20 = 260,114.40 : x
  2. Step 2: Convert to fraction form
    891,136.80/1,336,705.20 = 260,114.40/x
  3. Step 3: Cross multiply
    891,136.80x = 1,336,705.20 × 260,114.40
  4. Step 4: Simplify right side
    891,136.80x = 347,696,271,074.88
  5. Step 5: Solve for x
    x = 347,696,271,074.88/891,136.80
  6. Step 6: Final answer
    x = 390,171.60

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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.