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Finding the Fourth Proportional to 421,378.14, 581,501.88 and 230,391.66

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Solution

The fourth proportional to 421,378.14, 581,501.88 and 230,391.66 is: 317,940.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,378.14 : 581,501.88 = 230,391.66 : x
  2. Step 2: Convert to fraction form
    421,378.14/581,501.88 = 230,391.66/x
  3. Step 3: Cross multiply
    421,378.14x = 581,501.88 × 230,391.66
  4. Step 4: Simplify right side
    421,378.14x = 133,973,183,426.32
  5. Step 5: Solve for x
    x = 133,973,183,426.32/421,378.14
  6. Step 6: Final answer
    x = 317,940.52

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1.5x scale

Why These Related Problems?

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