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Finding the Fourth Proportional to 438,658.02, 658,010.43 and 139,162.55

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Solution

The fourth proportional to 438,658.02, 658,010.43 and 139,162.55 is: 208,751.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,658.02 : 658,010.43 = 139,162.55 : x
  2. Step 2: Convert to fraction form
    438,658.02/658,010.43 = 139,162.55/x
  3. Step 3: Cross multiply
    438,658.02x = 658,010.43 × 139,162.55
  4. Step 4: Simplify right side
    438,658.02x = 91,570,406,075.34
  5. Step 5: Solve for x
    x = 91,570,406,075.34/438,658.02
  6. Step 6: Final answer
    x = 208,751.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.