Home / 318,101.70-438,834-281,840.10

Finding the Fourth Proportional to 318,101.70, 438,834 and 281,840.10

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Solution

The fourth proportional to 318,101.70, 438,834 and 281,840.10 is: 388,809.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,101.70 : 438,834 = 281,840.10 : x
  2. Step 2: Convert to fraction form
    318,101.70/438,834 = 281,840.10/x
  3. Step 3: Cross multiply
    318,101.70x = 438,834 × 281,840.10
  4. Step 4: Simplify right side
    318,101.70x = 123,681,018,443.40
  5. Step 5: Solve for x
    x = 123,681,018,443.40/318,101.70
  6. Step 6: Final answer
    x = 388,809.67

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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.