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Finding the Fourth Proportional to 421,047.10, 631,570.65 and 243,462.70

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Solution

The fourth proportional to 421,047.10, 631,570.65 and 243,462.70 is: 365,194.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,047.10 : 631,570.65 = 243,462.70 : x
  2. Step 2: Convert to fraction form
    421,047.10/631,570.65 = 243,462.70/x
  3. Step 3: Cross multiply
    421,047.10x = 631,570.65 × 243,462.70
  4. Step 4: Simplify right side
    421,047.10x = 153,763,895,689.76
  5. Step 5: Solve for x
    x = 153,763,895,689.76/421,047.10
  6. Step 6: Final answer
    x = 365,194.05

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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.