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Finding the Fourth Proportional to 413,636.90, 620,455.35 and 256,172.90

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Solution

The fourth proportional to 413,636.90, 620,455.35 and 256,172.90 is: 384,259.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,636.90 : 620,455.35 = 256,172.90 : x
  2. Step 2: Convert to fraction form
    413,636.90/620,455.35 = 256,172.90/x
  3. Step 3: Cross multiply
    413,636.90x = 620,455.35 × 256,172.90
  4. Step 4: Simplify right side
    413,636.90x = 158,943,846,330.02
  5. Step 5: Solve for x
    x = 158,943,846,330.02/413,636.90
  6. Step 6: Final answer
    x = 384,259.35

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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.