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Finding the Fourth Proportional to 421,472.82, 581,632.47 and 230,486.34

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Solution

The fourth proportional to 421,472.82, 581,632.47 and 230,486.34 is: 318,071.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,472.82 : 581,632.47 = 230,486.34 : x
  2. Step 2: Convert to fraction form
    421,472.82/581,632.47 = 230,486.34/x
  3. Step 3: Cross multiply
    421,472.82x = 581,632.47 × 230,486.34
  4. Step 4: Simplify right side
    421,472.82x = 134,058,339,235.46
  5. Step 5: Solve for x
    x = 134,058,339,235.46/421,472.82
  6. Step 6: Final answer
    x = 318,071.14

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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.