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Finding the Fourth Proportional to 630,427.80, 945,771.30 and 210,005.40

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Solution

The fourth proportional to 630,427.80, 945,771.30 and 210,005.40 is: 315,051.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,427.80 : 945,771.30 = 210,005.40 : x
  2. Step 2: Convert to fraction form
    630,427.80/945,771.30 = 210,005.40/x
  3. Step 3: Cross multiply
    630,427.80x = 945,771.30 × 210,005.40
  4. Step 4: Simplify right side
    630,427.80x = 198,617,080,165.02
  5. Step 5: Solve for x
    x = 198,617,080,165.02/630,427.80
  6. Step 6: Final answer
    x = 315,051.27

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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.