Home / 420,445.42-630,293.18-154,143.88

Finding the Fourth Proportional to 420,445.42, 630,293.18 and 154,143.88

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Solution

The fourth proportional to 420,445.42, 630,293.18 and 154,143.88 is: 231,078.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,445.42 : 630,293.18 = 154,143.88 : x
  2. Step 2: Convert to fraction form
    420,445.42/630,293.18 = 154,143.88/x
  3. Step 3: Cross multiply
    420,445.42x = 630,293.18 × 154,143.88
  4. Step 4: Simplify right side
    420,445.42x = 97,155,836,302.74
  5. Step 5: Solve for x
    x = 97,155,836,302.74/420,445.42
  6. Step 6: Final answer
    x = 231,078.36

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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.