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Finding the Fourth Proportional to 1,570.86, 2,356.40 and 475.31

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Solution

The fourth proportional to 1,570.86, 2,356.40 and 475.31 is: 713.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,570.86 : 2,356.40 = 475.31 : x
  2. Step 2: Convert to fraction form
    1,570.86/2,356.40 = 475.31/x
  3. Step 3: Cross multiply
    1,570.86x = 2,356.40 × 475.31
  4. Step 4: Simplify right side
    1,570.86x = 1,120,018.73
  5. Step 5: Solve for x
    x = 1,120,018.73/1,570.86
  6. Step 6: Final answer
    x = 713.00

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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.