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Finding the Fourth Proportional to 420,453.35, 630,657.42 and 207,008.48

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Solution

The fourth proportional to 420,453.35, 630,657.42 and 207,008.48 is: 310,501.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,453.35 : 630,657.42 = 207,008.48 : x
  2. Step 2: Convert to fraction form
    420,453.35/630,657.42 = 207,008.48/x
  3. Step 3: Cross multiply
    420,453.35x = 630,657.42 × 207,008.48
  4. Step 4: Simplify right side
    420,453.35x = 130,551,434,410.63
  5. Step 5: Solve for x
    x = 130,551,434,410.63/420,453.35
  6. Step 6: Final answer
    x = 310,501.59

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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.