Home / 420,030.22-579,620.67-238,718.20

Finding the Fourth Proportional to 420,030.22, 579,620.67 and 238,718.20

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Solution

The fourth proportional to 420,030.22, 579,620.67 and 238,718.20 is: 329,419.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,030.22 : 579,620.67 = 238,718.20 : x
  2. Step 2: Convert to fraction form
    420,030.22/579,620.67 = 238,718.20/x
  3. Step 3: Cross multiply
    420,030.22x = 579,620.67 × 238,718.20
  4. Step 4: Simplify right side
    420,030.22x = 138,366,003,025.19
  5. Step 5: Solve for x
    x = 138,366,003,025.19/420,030.22
  6. Step 6: Final answer
    x = 329,419.16

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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.