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Finding the Fourth Proportional to 1,431.96, 2,148.12 and 507.30

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Solution

The fourth proportional to 1,431.96, 2,148.12 and 507.30 is: 761.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.96 : 2,148.12 = 507.30 : x
  2. Step 2: Convert to fraction form
    1,431.96/2,148.12 = 507.30/x
  3. Step 3: Cross multiply
    1,431.96x = 2,148.12 × 507.30
  4. Step 4: Simplify right side
    1,431.96x = 1,089,741.28
  5. Step 5: Solve for x
    x = 1,089,741.28/1,431.96
  6. Step 6: Final answer
    x = 761.01

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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.