Home / 1,288.60-1,931.58-557.56

Finding the Fourth Proportional to 1,288.60, 1,931.58 and 557.56

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Solution

The fourth proportional to 1,288.60, 1,931.58 and 557.56 is: 835.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.60 : 1,931.58 = 557.56 : x
  2. Step 2: Convert to fraction form
    1,288.60/1,931.58 = 557.56/x
  3. Step 3: Cross multiply
    1,288.60x = 1,931.58 × 557.56
  4. Step 4: Simplify right side
    1,288.60x = 1,076,971.74
  5. Step 5: Solve for x
    x = 1,076,971.74/1,288.60
  6. Step 6: Final answer
    x = 835.77

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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.