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Finding the Fourth Proportional to 421,873.99, 632,895.63 and 155,635.90

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Solution

The fourth proportional to 421,873.99, 632,895.63 and 155,635.90 is: 233,485.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,873.99 : 632,895.63 = 155,635.90 : x
  2. Step 2: Convert to fraction form
    421,873.99/632,895.63 = 155,635.90/x
  3. Step 3: Cross multiply
    421,873.99x = 632,895.63 × 155,635.90
  4. Step 4: Simplify right side
    421,873.99x = 98,501,280,981.12
  5. Step 5: Solve for x
    x = 98,501,280,981.12/421,873.99
  6. Step 6: Final answer
    x = 233,485.08

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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.