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Finding the Fourth Proportional to 315,297.68, 435,120.05 and 172,066.96

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Solution

The fourth proportional to 315,297.68, 435,120.05 and 172,066.96 is: 237,457.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,297.68 : 435,120.05 = 172,066.96 : x
  2. Step 2: Convert to fraction form
    315,297.68/435,120.05 = 172,066.96/x
  3. Step 3: Cross multiply
    315,297.68x = 435,120.05 × 172,066.96
  4. Step 4: Simplify right side
    315,297.68x = 74,869,782,290.41
  5. Step 5: Solve for x
    x = 74,869,782,290.41/315,297.68
  6. Step 6: Final answer
    x = 237,457.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.