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Finding the Fourth Proportional to 505,338.88, 697,288.22 and 290,437.45

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Solution

The fourth proportional to 505,338.88, 697,288.22 and 290,437.45 is: 400,758.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,338.88 : 697,288.22 = 290,437.45 : x
  2. Step 2: Convert to fraction form
    505,338.88/697,288.22 = 290,437.45/x
  3. Step 3: Cross multiply
    505,338.88x = 697,288.22 × 290,437.45
  4. Step 4: Simplify right side
    505,338.88x = 202,518,611,079.65
  5. Step 5: Solve for x
    x = 202,518,611,079.65/505,338.88
  6. Step 6: Final answer
    x = 400,758.02

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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.