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Finding the Fourth Proportional to 1,945.74, 2,915.70 and 970.50

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Solution

The fourth proportional to 1,945.74, 2,915.70 and 970.50 is: 1,454.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.74 : 2,915.70 = 970.50 : x
  2. Step 2: Convert to fraction form
    1,945.74/2,915.70 = 970.50/x
  3. Step 3: Cross multiply
    1,945.74x = 2,915.70 × 970.50
  4. Step 4: Simplify right side
    1,945.74x = 2,829,686.85
  5. Step 5: Solve for x
    x = 2,829,686.85/1,945.74
  6. Step 6: Final answer
    x = 1,454.30

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1.5x scale

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.