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Finding the Fourth Proportional to 421,130.31, 581,161.38 and 230,143.74

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Solution

The fourth proportional to 421,130.31, 581,161.38 and 230,143.74 is: 317,599.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,130.31 : 581,161.38 = 230,143.74 : x
  2. Step 2: Convert to fraction form
    421,130.31/581,161.38 = 230,143.74/x
  3. Step 3: Cross multiply
    421,130.31x = 581,161.38 × 230,143.74
  4. Step 4: Simplify right side
    421,130.31x = 133,750,653,536.76
  5. Step 5: Solve for x
    x = 133,750,653,536.76/421,130.31
  6. Step 6: Final answer
    x = 317,599.21

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.