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Finding the Fourth Proportional to 1,970.59, 2,955.87 and 509.74

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Solution

The fourth proportional to 1,970.59, 2,955.87 and 509.74 is: 764.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.59 : 2,955.87 = 509.74 : x
  2. Step 2: Convert to fraction form
    1,970.59/2,955.87 = 509.74/x
  3. Step 3: Cross multiply
    1,970.59x = 2,955.87 × 509.74
  4. Step 4: Simplify right side
    1,970.59x = 1,506,725.17
  5. Step 5: Solve for x
    x = 1,506,725.17/1,970.59
  6. Step 6: Final answer
    x = 764.61

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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.