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Finding the Fourth Proportional to 280,613.35, 387,255.90 and 153,297.01

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Solution

The fourth proportional to 280,613.35, 387,255.90 and 153,297.01 is: 211,555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,613.35 : 387,255.90 = 153,297.01 : x
  2. Step 2: Convert to fraction form
    280,613.35/387,255.90 = 153,297.01/x
  3. Step 3: Cross multiply
    280,613.35x = 387,255.90 × 153,297.01
  4. Step 4: Simplify right side
    280,613.35x = 59,365,171,574.86
  5. Step 5: Solve for x
    x = 59,365,171,574.86/280,613.35
  6. Step 6: Final answer
    x = 211,555.05

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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.