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Finding the Fourth Proportional to 420,155.60, 630,233.40 and 243,008.60

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Solution

The fourth proportional to 420,155.60, 630,233.40 and 243,008.60 is: 364,512.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,155.60 : 630,233.40 = 243,008.60 : x
  2. Step 2: Convert to fraction form
    420,155.60/630,233.40 = 243,008.60/x
  3. Step 3: Cross multiply
    420,155.60x = 630,233.40 × 243,008.60
  4. Step 4: Simplify right side
    420,155.60x = 153,152,136,207.24
  5. Step 5: Solve for x
    x = 153,152,136,207.24/420,155.60
  6. Step 6: Final answer
    x = 364,512.90

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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.