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Finding the Fourth Proportional to 421,560.80, 581,768.88 and 240,300.08

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Solution

The fourth proportional to 421,560.80, 581,768.88 and 240,300.08 is: 331,622.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,560.80 : 581,768.88 = 240,300.08 : x
  2. Step 2: Convert to fraction form
    421,560.80/581,768.88 = 240,300.08/x
  3. Step 3: Cross multiply
    421,560.80x = 581,768.88 × 240,300.08
  4. Step 4: Simplify right side
    421,560.80x = 139,799,108,405.51
  5. Step 5: Solve for x
    x = 139,799,108,405.51/421,560.80
  6. Step 6: Final answer
    x = 331,622.65

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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.