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Finding the Fourth Proportional to 581.50, 802.45 and 319.51

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Solution

The fourth proportional to 581.50, 802.45 and 319.51 is: 440.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.50 : 802.45 = 319.51 : x
  2. Step 2: Convert to fraction form
    581.50/802.45 = 319.51/x
  3. Step 3: Cross multiply
    581.50x = 802.45 × 319.51
  4. Step 4: Simplify right side
    581.50x = 256,390.80
  5. Step 5: Solve for x
    x = 256,390.80/581.50
  6. Step 6: Final answer
    x = 440.91

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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.