Home / 420,905.30-630,665.40-243,102.20

Finding the Fourth Proportional to 420,905.30, 630,665.40 and 243,102.20

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Solution

The fourth proportional to 420,905.30, 630,665.40 and 243,102.20 is: 364,253.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,905.30 : 630,665.40 = 243,102.20 : x
  2. Step 2: Convert to fraction form
    420,905.30/630,665.40 = 243,102.20/x
  3. Step 3: Cross multiply
    420,905.30x = 630,665.40 × 243,102.20
  4. Step 4: Simplify right side
    420,905.30x = 153,316,146,203.88
  5. Step 5: Solve for x
    x = 153,316,146,203.88/420,905.30
  6. Step 6: Final answer
    x = 364,253.30

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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.