Home / 420,410.10-580,178.75-239,148.30

Finding the Fourth Proportional to 420,410.10, 580,178.75 and 239,148.30

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Solution

The fourth proportional to 420,410.10, 580,178.75 and 239,148.30 is: 330,031.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,410.10 : 580,178.75 = 239,148.30 : x
  2. Step 2: Convert to fraction form
    420,410.10/580,178.75 = 239,148.30/x
  3. Step 3: Cross multiply
    420,410.10x = 580,178.75 × 239,148.30
  4. Step 4: Simplify right side
    420,410.10x = 138,748,761,758.63
  5. Step 5: Solve for x
    x = 138,748,761,758.63/420,410.10
  6. Step 6: Final answer
    x = 330,031.94

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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.