Home / 318,139.34-438,885.98-281,877.51

Finding the Fourth Proportional to 318,139.34, 438,885.98 and 281,877.51

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Solution

The fourth proportional to 318,139.34, 438,885.98 and 281,877.51 is: 388,861.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,139.34 : 438,885.98 = 281,877.51 : x
  2. Step 2: Convert to fraction form
    318,139.34/438,885.98 = 281,877.51/x
  3. Step 3: Cross multiply
    318,139.34x = 438,885.98 × 281,877.51
  4. Step 4: Simplify right side
    318,139.34x = 123,712,087,921.00
  5. Step 5: Solve for x
    x = 123,712,087,921.00/318,139.34
  6. Step 6: Final answer
    x = 388,861.34

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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.