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Finding the Fourth Proportional to 939,380, 1,296,344.40 and 536,980.64

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Solution

The fourth proportional to 939,380, 1,296,344.40 and 536,980.64 is: 741,033.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,380 : 1,296,344.40 = 536,980.64 : x
  2. Step 2: Convert to fraction form
    939,380/1,296,344.40 = 536,980.64/x
  3. Step 3: Cross multiply
    939,380x = 1,296,344.40 × 536,980.64
  4. Step 4: Simplify right side
    939,380x = 696,111,845,572.42
  5. Step 5: Solve for x
    x = 696,111,845,572.42/939,380
  6. Step 6: Final answer
    x = 741,033.28

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1.5x scale

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.