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Finding the Fourth Proportional to 1,557.02, 2,335.86 and 517.35

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Solution

The fourth proportional to 1,557.02, 2,335.86 and 517.35 is: 776.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.02 : 2,335.86 = 517.35 : x
  2. Step 2: Convert to fraction form
    1,557.02/2,335.86 = 517.35/x
  3. Step 3: Cross multiply
    1,557.02x = 2,335.86 × 517.35
  4. Step 4: Simplify right side
    1,557.02x = 1,208,457.17
  5. Step 5: Solve for x
    x = 1,208,457.17/1,557.02
  6. Step 6: Final answer
    x = 776.14

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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.