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Finding the Fourth Proportional to 425.76, 586.70 and 307.33

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Solution

The fourth proportional to 425.76, 586.70 and 307.33 is: 423.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.76 : 586.70 = 307.33 : x
  2. Step 2: Convert to fraction form
    425.76/586.70 = 307.33/x
  3. Step 3: Cross multiply
    425.76x = 586.70 × 307.33
  4. Step 4: Simplify right side
    425.76x = 180,310.51
  5. Step 5: Solve for x
    x = 180,310.51/425.76
  6. Step 6: Final answer
    x = 423.50

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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.