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Finding the Fourth Proportional to 421,556.90, 581,762.44 and 230,570.30

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Solution

The fourth proportional to 421,556.90, 581,762.44 and 230,570.30 is: 318,194.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,556.90 : 581,762.44 = 230,570.30 : x
  2. Step 2: Convert to fraction form
    421,556.90/581,762.44 = 230,570.30/x
  3. Step 3: Cross multiply
    421,556.90x = 581,762.44 × 230,570.30
  4. Step 4: Simplify right side
    421,556.90x = 134,137,140,319.53
  5. Step 5: Solve for x
    x = 134,137,140,319.53/421,556.90
  6. Step 6: Final answer
    x = 318,194.63

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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.