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Finding the Fourth Proportional to 630,427.80, 945,728.10 and 209,659.80

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Solution

The fourth proportional to 630,427.80, 945,728.10 and 209,659.80 is: 314,518.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,427.80 : 945,728.10 = 209,659.80 : x
  2. Step 2: Convert to fraction form
    630,427.80/945,728.10 = 209,659.80/x
  3. Step 3: Cross multiply
    630,427.80x = 945,728.10 × 209,659.80
  4. Step 4: Simplify right side
    630,427.80x = 198,281,164,300.38
  5. Step 5: Solve for x
    x = 198,281,164,300.38/630,427.80
  6. Step 6: Final answer
    x = 314,518.43

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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.