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Finding the Fourth Proportional to 505,145.70, 697,220.73 and 290,410.52

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Solution

The fourth proportional to 505,145.70, 697,220.73 and 290,410.52 is: 400,835.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,145.70 : 697,220.73 = 290,410.52 : x
  2. Step 2: Convert to fraction form
    505,145.70/697,220.73 = 290,410.52/x
  3. Step 3: Cross multiply
    505,145.70x = 697,220.73 × 290,410.52
  4. Step 4: Simplify right side
    505,145.70x = 202,480,231,267.98
  5. Step 5: Solve for x
    x = 202,480,231,267.98/505,145.70
  6. Step 6: Final answer
    x = 400,835.31

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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.