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Finding the Fourth Proportional to 443,405.60, 664,378.80 and 256,090.40

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Solution

The fourth proportional to 443,405.60, 664,378.80 and 256,090.40 is: 383,714.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,405.60 : 664,378.80 = 256,090.40 : x
  2. Step 2: Convert to fraction form
    443,405.60/664,378.80 = 256,090.40/x
  3. Step 3: Cross multiply
    443,405.60x = 664,378.80 × 256,090.40
  4. Step 4: Simplify right side
    443,405.60x = 170,141,032,643.52
  5. Step 5: Solve for x
    x = 170,141,032,643.52/443,405.60
  6. Step 6: Final answer
    x = 383,714.22

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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.