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Finding the Fourth Proportional to 647,999.72, 894,226.90 and 357,638.60

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Solution

The fourth proportional to 647,999.72, 894,226.90 and 357,638.60 is: 493,534.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,999.72 : 894,226.90 = 357,638.60 : x
  2. Step 2: Convert to fraction form
    647,999.72/894,226.90 = 357,638.60/x
  3. Step 3: Cross multiply
    647,999.72x = 894,226.90 × 357,638.60
  4. Step 4: Simplify right side
    647,999.72x = 319,810,056,598.34
  5. Step 5: Solve for x
    x = 319,810,056,598.34/647,999.72
  6. Step 6: Final answer
    x = 493,534.25

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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.