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Finding the Fourth Proportional to 1,571.54, 2,357.42 and 647.08

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Solution

The fourth proportional to 1,571.54, 2,357.42 and 647.08 is: 970.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,571.54 : 2,357.42 = 647.08 : x
  2. Step 2: Convert to fraction form
    1,571.54/2,357.42 = 647.08/x
  3. Step 3: Cross multiply
    1,571.54x = 2,357.42 × 647.08
  4. Step 4: Simplify right side
    1,571.54x = 1,525,430.20
  5. Step 5: Solve for x
    x = 1,525,430.20/1,571.54
  6. Step 6: Final answer
    x = 970.66

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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.