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Finding the Fourth Proportional to 405,505.28, 560,223.36 and 310,396.16

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Solution

The fourth proportional to 405,505.28, 560,223.36 and 310,396.16 is: 428,825.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,505.28 : 560,223.36 = 310,396.16 : x
  2. Step 2: Convert to fraction form
    405,505.28/560,223.36 = 310,396.16/x
  3. Step 3: Cross multiply
    405,505.28x = 560,223.36 × 310,396.16
  4. Step 4: Simplify right side
    405,505.28x = 173,891,179,686.30
  5. Step 5: Solve for x
    x = 173,891,179,686.30/405,505.28
  6. Step 6: Final answer
    x = 428,825.93

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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.