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Finding the Fourth Proportional to 260,705.40, 391,349.70 and 201,802.20

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Solution

The fourth proportional to 260,705.40, 391,349.70 and 201,802.20 is: 302,929.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,705.40 : 391,349.70 = 201,802.20 : x
  2. Step 2: Convert to fraction form
    260,705.40/391,349.70 = 201,802.20/x
  3. Step 3: Cross multiply
    260,705.40x = 391,349.70 × 201,802.20
  4. Step 4: Simplify right side
    260,705.40x = 78,975,230,429.34
  5. Step 5: Solve for x
    x = 78,975,230,429.34/260,705.40
  6. Step 6: Final answer
    x = 302,929.02

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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.