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Finding the Fourth Proportional to 420,633.90, 631,606.95 and 243,486.90

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Solution

The fourth proportional to 420,633.90, 631,606.95 and 243,486.90 is: 365,610.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,633.90 : 631,606.95 = 243,486.90 : x
  2. Step 2: Convert to fraction form
    420,633.90/631,606.95 = 243,486.90/x
  3. Step 3: Cross multiply
    420,633.90x = 631,606.95 × 243,486.90
  4. Step 4: Simplify right side
    420,633.90x = 153,788,018,273.96
  5. Step 5: Solve for x
    x = 153,788,018,273.96/420,633.90
  6. Step 6: Final answer
    x = 365,610.14

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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.