Home / 1,290.15-1,935.90-560.34

Finding the Fourth Proportional to 1,290.15, 1,935.90 and 560.34

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Solution

The fourth proportional to 1,290.15, 1,935.90 and 560.34 is: 840.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.15 : 1,935.90 = 560.34 : x
  2. Step 2: Convert to fraction form
    1,290.15/1,935.90 = 560.34/x
  3. Step 3: Cross multiply
    1,290.15x = 1,935.90 × 560.34
  4. Step 4: Simplify right side
    1,290.15x = 1,084,762.21
  5. Step 5: Solve for x
    x = 1,084,762.21/1,290.15
  6. Step 6: Final answer
    x = 840.80

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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.