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Finding the Fourth Proportional to 280,814.42, 387,524.09 and 153,490.01

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Solution

The fourth proportional to 280,814.42, 387,524.09 and 153,490.01 is: 211,816.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,814.42 : 387,524.09 = 153,490.01 : x
  2. Step 2: Convert to fraction form
    280,814.42/387,524.09 = 153,490.01/x
  3. Step 3: Cross multiply
    280,814.42x = 387,524.09 × 153,490.01
  4. Step 4: Simplify right side
    280,814.42x = 59,481,074,895.45
  5. Step 5: Solve for x
    x = 59,481,074,895.45/280,814.42
  6. Step 6: Final answer
    x = 211,816.31

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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.