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Finding the Fourth Proportional to 630,421.20, 945,631.80 and 314,926.80

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Solution

The fourth proportional to 630,421.20, 945,631.80 and 314,926.80 is: 472,390.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,421.20 : 945,631.80 = 314,926.80 : x
  2. Step 2: Convert to fraction form
    630,421.20/945,631.80 = 314,926.80/x
  3. Step 3: Cross multiply
    630,421.20x = 945,631.80 × 314,926.80
  4. Step 4: Simplify right side
    630,421.20x = 297,804,796,752.24
  5. Step 5: Solve for x
    x = 297,804,796,752.24/630,421.20
  6. Step 6: Final answer
    x = 472,390.20

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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.