Home / 420,115.42-579,809.10-238,854.70

Finding the Fourth Proportional to 420,115.42, 579,809.10 and 238,854.70

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Solution

The fourth proportional to 420,115.42, 579,809.10 and 238,854.70 is: 329,647.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,115.42 : 579,809.10 = 238,854.70 : x
  2. Step 2: Convert to fraction form
    420,115.42/579,809.10 = 238,854.70/x
  3. Step 3: Cross multiply
    420,115.42x = 579,809.10 × 238,854.70
  4. Step 4: Simplify right side
    420,115.42x = 138,490,128,637.77
  5. Step 5: Solve for x
    x = 138,490,128,637.77/420,115.42
  6. Step 6: Final answer
    x = 329,647.81

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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.