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Finding the Fourth Proportional to 945.04, 1,300.58 and 778.60

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Solution

The fourth proportional to 945.04, 1,300.58 and 778.60 is: 1,071.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.04 : 1,300.58 = 778.60 : x
  2. Step 2: Convert to fraction form
    945.04/1,300.58 = 778.60/x
  3. Step 3: Cross multiply
    945.04x = 1,300.58 × 778.60
  4. Step 4: Simplify right side
    945.04x = 1,012,627.70
  5. Step 5: Solve for x
    x = 1,012,627.70/945.04
  6. Step 6: Final answer
    x = 1,071.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.