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Finding the Fourth Proportional to 630,209.60, 945,928.80 and 315,022.40

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Solution

The fourth proportional to 630,209.60, 945,928.80 and 315,022.40 is: 472,840.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,209.60 : 945,928.80 = 315,022.40 : x
  2. Step 2: Convert to fraction form
    630,209.60/945,928.80 = 315,022.40/x
  3. Step 3: Cross multiply
    630,209.60x = 945,928.80 × 315,022.40
  4. Step 4: Simplify right side
    630,209.60x = 297,988,760,805.12
  5. Step 5: Solve for x
    x = 297,988,760,805.12/630,209.60
  6. Step 6: Final answer
    x = 472,840.72

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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.