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Finding the Fourth Proportional to 420,114.42, 579,807.72 and 238,853.70

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Solution

The fourth proportional to 420,114.42, 579,807.72 and 238,853.70 is: 329,646.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,114.42 : 579,807.72 = 238,853.70 : x
  2. Step 2: Convert to fraction form
    420,114.42/579,807.72 = 238,853.70/x
  3. Step 3: Cross multiply
    420,114.42x = 579,807.72 × 238,853.70
  4. Step 4: Simplify right side
    420,114.42x = 138,489,219,210.56
  5. Step 5: Solve for x
    x = 138,489,219,210.56/420,114.42
  6. Step 6: Final answer
    x = 329,646.43

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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.