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Finding the Fourth Proportional to 520,004.57, 717,611.04 and 305,148.21

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Solution

The fourth proportional to 520,004.57, 717,611.04 and 305,148.21 is: 421,107.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,004.57 : 717,611.04 = 305,148.21 : x
  2. Step 2: Convert to fraction form
    520,004.57/717,611.04 = 305,148.21/x
  3. Step 3: Cross multiply
    520,004.57x = 717,611.04 × 305,148.21
  4. Step 4: Simplify right side
    520,004.57x = 218,977,724,332.24
  5. Step 5: Solve for x
    x = 218,977,724,332.24/520,004.57
  6. Step 6: Final answer
    x = 421,107.31

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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.