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Finding the Fourth Proportional to 630,965.80, 946,448.70 and 256,988.80

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Solution

The fourth proportional to 630,965.80, 946,448.70 and 256,988.80 is: 385,483.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,965.80 : 946,448.70 = 256,988.80 : x
  2. Step 2: Convert to fraction form
    630,965.80/946,448.70 = 256,988.80/x
  3. Step 3: Cross multiply
    630,965.80x = 946,448.70 × 256,988.80
  4. Step 4: Simplify right side
    630,965.80x = 243,226,715,674.56
  5. Step 5: Solve for x
    x = 243,226,715,674.56/630,965.80
  6. Step 6: Final answer
    x = 385,483.20

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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.