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Finding the Fourth Proportional to 630,165.40, 945,248.10 and 209,506.20

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Solution

The fourth proportional to 630,165.40, 945,248.10 and 209,506.20 is: 314,259.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,165.40 : 945,248.10 = 209,506.20 : x
  2. Step 2: Convert to fraction form
    630,165.40/945,248.10 = 209,506.20/x
  3. Step 3: Cross multiply
    630,165.40x = 945,248.10 × 209,506.20
  4. Step 4: Simplify right side
    630,165.40x = 198,035,337,488.22
  5. Step 5: Solve for x
    x = 198,035,337,488.22/630,165.40
  6. Step 6: Final answer
    x = 314,259.30

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Double scale
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Similar ratio
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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.