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Finding the Fourth Proportional to 520,342.13, 717,980.28 and 290,826.05

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Solution

The fourth proportional to 520,342.13, 717,980.28 and 290,826.05 is: 401,288.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,342.13 : 717,980.28 = 290,826.05 : x
  2. Step 2: Convert to fraction form
    520,342.13/717,980.28 = 290,826.05/x
  3. Step 3: Cross multiply
    520,342.13x = 717,980.28 × 290,826.05
  4. Step 4: Simplify right side
    520,342.13x = 208,807,368,810.29
  5. Step 5: Solve for x
    x = 208,807,368,810.29/520,342.13
  6. Step 6: Final answer
    x = 401,288.61

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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.