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Finding the Fourth Proportional to 472,718, 708,679.29 and 219,870.02

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Solution

The fourth proportional to 472,718, 708,679.29 and 219,870.02 is: 329,620.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,718 : 708,679.29 = 219,870.02 : x
  2. Step 2: Convert to fraction form
    472,718/708,679.29 = 219,870.02/x
  3. Step 3: Cross multiply
    472,718x = 708,679.29 × 219,870.02
  4. Step 4: Simplify right side
    472,718x = 155,817,329,665.89
  5. Step 5: Solve for x
    x = 155,817,329,665.89/472,718
  6. Step 6: Final answer
    x = 329,620.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.