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Finding the Fourth Proportional to 660,495.60, 911,700.36 and 388,549.44

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Solution

The fourth proportional to 660,495.60, 911,700.36 and 388,549.44 is: 536,325.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,495.60 : 911,700.36 = 388,549.44 : x
  2. Step 2: Convert to fraction form
    660,495.60/911,700.36 = 388,549.44/x
  3. Step 3: Cross multiply
    660,495.60x = 911,700.36 × 388,549.44
  4. Step 4: Simplify right side
    660,495.60x = 354,240,664,325.80
  5. Step 5: Solve for x
    x = 354,240,664,325.80/660,495.60
  6. Step 6: Final answer
    x = 536,325.55

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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.