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Finding the Fourth Proportional to 530,936.66, 732,691.40 and 289,218.65

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Solution

The fourth proportional to 530,936.66, 732,691.40 and 289,218.65 is: 399,121.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,936.66 : 732,691.40 = 289,218.65 : x
  2. Step 2: Convert to fraction form
    530,936.66/732,691.40 = 289,218.65/x
  3. Step 3: Cross multiply
    530,936.66x = 732,691.40 × 289,218.65
  4. Step 4: Simplify right side
    530,936.66x = 211,908,012,465.06
  5. Step 5: Solve for x
    x = 211,908,012,465.06/530,936.66
  6. Step 6: Final answer
    x = 399,121.08

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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.