Home / 309,478.24-427,155.94-188,686.13

Finding the Fourth Proportional to 309,478.24, 427,155.94 and 188,686.13

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Solution

The fourth proportional to 309,478.24, 427,155.94 and 188,686.13 is: 260,433.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,478.24 : 427,155.94 = 188,686.13 : x
  2. Step 2: Convert to fraction form
    309,478.24/427,155.94 = 188,686.13/x
  3. Step 3: Cross multiply
    309,478.24x = 427,155.94 × 188,686.13
  4. Step 4: Simplify right side
    309,478.24x = 80,598,400,927.02
  5. Step 5: Solve for x
    x = 80,598,400,927.02/309,478.24
  6. Step 6: Final answer
    x = 260,433.17

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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.