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Finding the Fourth Proportional to 413,959.60, 620,939.40 and 256,495.60

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Solution

The fourth proportional to 413,959.60, 620,939.40 and 256,495.60 is: 384,743.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,959.60 : 620,939.40 = 256,495.60 : x
  2. Step 2: Convert to fraction form
    413,959.60/620,939.40 = 256,495.60/x
  3. Step 3: Cross multiply
    413,959.60x = 620,939.40 × 256,495.60
  4. Step 4: Simplify right side
    413,959.60x = 159,268,223,966.64
  5. Step 5: Solve for x
    x = 159,268,223,966.64/413,959.60
  6. Step 6: Final answer
    x = 384,743.40

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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.