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Finding the Fourth Proportional to 413,636.40, 620,454.60 and 256,172.40

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Solution

The fourth proportional to 413,636.40, 620,454.60 and 256,172.40 is: 384,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,636.40 : 620,454.60 = 256,172.40 : x
  2. Step 2: Convert to fraction form
    413,636.40/620,454.60 = 256,172.40/x
  3. Step 3: Cross multiply
    413,636.40x = 620,454.60 × 256,172.40
  4. Step 4: Simplify right side
    413,636.40x = 158,943,343,973.04
  5. Step 5: Solve for x
    x = 158,943,343,973.04/413,636.40
  6. Step 6: Final answer
    x = 384,258.60

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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.