Home / 420,532.38-630,152.82-285,420.96

Finding the Fourth Proportional to 420,532.38, 630,152.82 and 285,420.96

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Solution

The fourth proportional to 420,532.38, 630,152.82 and 285,420.96 is: 427,693.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,532.38 : 630,152.82 = 285,420.96 : x
  2. Step 2: Convert to fraction form
    420,532.38/630,152.82 = 285,420.96/x
  3. Step 3: Cross multiply
    420,532.38x = 630,152.82 × 285,420.96
  4. Step 4: Simplify right side
    420,532.38x = 179,858,822,831.11
  5. Step 5: Solve for x
    x = 179,858,822,831.11/420,532.38
  6. Step 6: Final answer
    x = 427,693.16

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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.