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Finding the Fourth Proportional to 946.05, 1,304.70 and 647.16

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Solution

The fourth proportional to 946.05, 1,304.70 and 647.16 is: 892.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.05 : 1,304.70 = 647.16 : x
  2. Step 2: Convert to fraction form
    946.05/1,304.70 = 647.16/x
  3. Step 3: Cross multiply
    946.05x = 1,304.70 × 647.16
  4. Step 4: Simplify right side
    946.05x = 844,349.65
  5. Step 5: Solve for x
    x = 844,349.65/946.05
  6. Step 6: Final answer
    x = 892.50

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Double scale
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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.