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Finding the Fourth Proportional to 420,212.48, 630,317.36 and 251,783.41

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Solution

The fourth proportional to 420,212.48, 630,317.36 and 251,783.41 is: 377,674.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,212.48 : 630,317.36 = 251,783.41 : x
  2. Step 2: Convert to fraction form
    420,212.48/630,317.36 = 251,783.41/x
  3. Step 3: Cross multiply
    420,212.48x = 630,317.36 × 251,783.41
  4. Step 4: Simplify right side
    420,212.48x = 158,703,454,283.00
  5. Step 5: Solve for x
    x = 158,703,454,283.00/420,212.48
  6. Step 6: Final answer
    x = 377,674.30

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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.