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Finding the Fourth Proportional to 509,975.60, 764,963.40 and 459,237.20

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Solution

The fourth proportional to 509,975.60, 764,963.40 and 459,237.20 is: 688,855.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,975.60 : 764,963.40 = 459,237.20 : x
  2. Step 2: Convert to fraction form
    509,975.60/764,963.40 = 459,237.20/x
  3. Step 3: Cross multiply
    509,975.60x = 764,963.40 × 459,237.20
  4. Step 4: Simplify right side
    509,975.60x = 351,299,649,918.48
  5. Step 5: Solve for x
    x = 351,299,649,918.48/509,975.60
  6. Step 6: Final answer
    x = 688,855.80

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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.