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Finding the Fourth Proportional to 678.08, 934.08 and 503.36

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Solution

The fourth proportional to 678.08, 934.08 and 503.36 is: 693.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.08 : 934.08 = 503.36 : x
  2. Step 2: Convert to fraction form
    678.08/934.08 = 503.36/x
  3. Step 3: Cross multiply
    678.08x = 934.08 × 503.36
  4. Step 4: Simplify right side
    678.08x = 470,178.51
  5. Step 5: Solve for x
    x = 470,178.51/678.08
  6. Step 6: Final answer
    x = 693.40

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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.