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Finding the Fourth Proportional to 420,420.41, 630,255.63 and 154,118.76

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Solution

The fourth proportional to 420,420.41, 630,255.63 and 154,118.76 is: 231,040.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,420.41 : 630,255.63 = 154,118.76 : x
  2. Step 2: Convert to fraction form
    420,420.41/630,255.63 = 154,118.76/x
  3. Step 3: Cross multiply
    420,420.41x = 630,255.63 × 154,118.76
  4. Step 4: Simplify right side
    420,420.41x = 97,134,216,178.62
  5. Step 5: Solve for x
    x = 97,134,216,178.62/420,420.41
  6. Step 6: Final answer
    x = 231,040.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.