Home / 317,158.12-438,222.18-305,805.16

Finding the Fourth Proportional to 317,158.12, 438,222.18 and 305,805.16

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Solution

The fourth proportional to 317,158.12, 438,222.18 and 305,805.16 is: 422,535.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,158.12 : 438,222.18 = 305,805.16 : x
  2. Step 2: Convert to fraction form
    317,158.12/438,222.18 = 305,805.16/x
  3. Step 3: Cross multiply
    317,158.12x = 438,222.18 × 305,805.16
  4. Step 4: Simplify right side
    317,158.12x = 134,010,603,870.45
  5. Step 5: Solve for x
    x = 134,010,603,870.45/317,158.12
  6. Step 6: Final answer
    x = 422,535.62

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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.