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Finding the Fourth Proportional to 1,657.29, 2,485.08 and 561.30

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Solution

The fourth proportional to 1,657.29, 2,485.08 and 561.30 is: 841.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.29 : 2,485.08 = 561.30 : x
  2. Step 2: Convert to fraction form
    1,657.29/2,485.08 = 561.30/x
  3. Step 3: Cross multiply
    1,657.29x = 2,485.08 × 561.30
  4. Step 4: Simplify right side
    1,657.29x = 1,394,875.40
  5. Step 5: Solve for x
    x = 1,394,875.40/1,657.29
  6. Step 6: Final answer
    x = 841.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.