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Finding the Fourth Proportional to 420,484.36, 630,809.76 and 154,247.20

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Solution

The fourth proportional to 420,484.36, 630,809.76 and 154,247.20 is: 231,401.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,484.36 : 630,809.76 = 154,247.20 : x
  2. Step 2: Convert to fraction form
    420,484.36/630,809.76 = 154,247.20/x
  3. Step 3: Cross multiply
    420,484.36x = 630,809.76 × 154,247.20
  4. Step 4: Simplify right side
    420,484.36x = 97,300,639,212.67
  5. Step 5: Solve for x
    x = 97,300,639,212.67/420,484.36
  6. Step 6: Final answer
    x = 231,401.33

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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.