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Finding the Fourth Proportional to 581.60, 802.80 and 415.91

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Solution

The fourth proportional to 581.60, 802.80 and 415.91 is: 574.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    581.60 : 802.80 = 415.91 : x
  2. Step 2: Convert to fraction form
    581.60/802.80 = 415.91/x
  3. Step 3: Cross multiply
    581.60x = 802.80 × 415.91
  4. Step 4: Simplify right side
    581.60x = 333,888.53
  5. Step 5: Solve for x
    x = 333,888.53/581.60
  6. Step 6: Final answer
    x = 574.09

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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.