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Finding the Fourth Proportional to 420,181.30, 630,271.60 and 153,962.64

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Solution

The fourth proportional to 420,181.30, 630,271.60 and 153,962.64 is: 230,943.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,181.30 : 630,271.60 = 153,962.64 : x
  2. Step 2: Convert to fraction form
    420,181.30/630,271.60 = 153,962.64/x
  3. Step 3: Cross multiply
    420,181.30x = 630,271.60 × 153,962.64
  4. Step 4: Simplify right side
    420,181.30x = 97,038,279,453.02
  5. Step 5: Solve for x
    x = 97,038,279,453.02/420,181.30
  6. Step 6: Final answer
    x = 230,943.83

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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.