Home / 420,580.08-630,627.75-287,621.46

Finding the Fourth Proportional to 420,580.08, 630,627.75 and 287,621.46

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Solution

The fourth proportional to 420,580.08, 630,627.75 and 287,621.46 is: 431,266.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,580.08 : 630,627.75 = 287,621.46 : x
  2. Step 2: Convert to fraction form
    420,580.08/630,627.75 = 287,621.46/x
  3. Step 3: Cross multiply
    420,580.08x = 630,627.75 × 287,621.46
  4. Step 4: Simplify right side
    420,580.08x = 181,382,074,171.52
  5. Step 5: Solve for x
    x = 181,382,074,171.52/420,580.08
  6. Step 6: Final answer
    x = 431,266.44

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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.