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Finding the Fourth Proportional to 473.40, 708.78 and 430.10

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Solution

The fourth proportional to 473.40, 708.78 and 430.10 is: 643.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.40 : 708.78 = 430.10 : x
  2. Step 2: Convert to fraction form
    473.40/708.78 = 430.10/x
  3. Step 3: Cross multiply
    473.40x = 708.78 × 430.10
  4. Step 4: Simplify right side
    473.40x = 304,846.28
  5. Step 5: Solve for x
    x = 304,846.28/473.40
  6. Step 6: Final answer
    x = 643.95

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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.