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Finding the Fourth Proportional to 581.39, 802.28 and 319.35

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Solution

The fourth proportional to 581.39, 802.28 and 319.35 is: 440.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.39 : 802.28 = 319.35 : x
  2. Step 2: Convert to fraction form
    581.39/802.28 = 319.35/x
  3. Step 3: Cross multiply
    581.39x = 802.28 × 319.35
  4. Step 4: Simplify right side
    581.39x = 256,206.52
  5. Step 5: Solve for x
    x = 256,206.52/581.39
  6. Step 6: Final answer
    x = 440.68

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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.