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Finding the Fourth Proportional to 509,607.60, 764,411.40 and 439,623.60

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Solution

The fourth proportional to 509,607.60, 764,411.40 and 439,623.60 is: 659,435.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,607.60 : 764,411.40 = 439,623.60 : x
  2. Step 2: Convert to fraction form
    509,607.60/764,411.40 = 439,623.60/x
  3. Step 3: Cross multiply
    509,607.60x = 764,411.40 × 439,623.60
  4. Step 4: Simplify right side
    509,607.60x = 336,053,291,549.04
  5. Step 5: Solve for x
    x = 336,053,291,549.04/509,607.60
  6. Step 6: Final answer
    x = 659,435.40

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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.