Home / 318,140.46-438,887.54-281,878.63

Finding the Fourth Proportional to 318,140.46, 438,887.54 and 281,878.63

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Solution

The fourth proportional to 318,140.46, 438,887.54 and 281,878.63 is: 388,862.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,140.46 : 438,887.54 = 281,878.63 : x
  2. Step 2: Convert to fraction form
    318,140.46/438,887.54 = 281,878.63/x
  3. Step 3: Cross multiply
    318,140.46x = 438,887.54 × 281,878.63
  4. Step 4: Simplify right side
    318,140.46x = 123,713,018,499.27
  5. Step 5: Solve for x
    x = 123,713,018,499.27/318,140.46
  6. Step 6: Final answer
    x = 388,862.89

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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.