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Finding the Fourth Proportional to 420,088.76, 579,699.46 and 238,775.54

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Solution

The fourth proportional to 420,088.76, 579,699.46 and 238,775.54 is: 329,497.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,088.76 : 579,699.46 = 238,775.54 : x
  2. Step 2: Convert to fraction form
    420,088.76/579,699.46 = 238,775.54/x
  3. Step 3: Cross multiply
    420,088.76x = 579,699.46 × 238,775.54
  4. Step 4: Simplify right side
    420,088.76x = 138,418,048,103.77
  5. Step 5: Solve for x
    x = 138,418,048,103.77/420,088.76
  6. Step 6: Final answer
    x = 329,497.15

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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.