Home / 420,225.11-579,938.06-238,953.91

Finding the Fourth Proportional to 420,225.11, 579,938.06 and 238,953.91

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Solution

The fourth proportional to 420,225.11, 579,938.06 and 238,953.91 is: 329,771.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,225.11 : 579,938.06 = 238,953.91 : x
  2. Step 2: Convert to fraction form
    420,225.11/579,938.06 = 238,953.91/x
  3. Step 3: Cross multiply
    420,225.11x = 579,938.06 × 238,953.91
  4. Step 4: Simplify right side
    420,225.11x = 138,578,466,994.82
  5. Step 5: Solve for x
    x = 138,578,466,994.82/420,225.11
  6. Step 6: Final answer
    x = 329,771.98

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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.