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Finding the Fourth Proportional to 613,497.60, 920,246.40 and 520,185.60

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Solution

The fourth proportional to 613,497.60, 920,246.40 and 520,185.60 is: 780,278.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,497.60 : 920,246.40 = 520,185.60 : x
  2. Step 2: Convert to fraction form
    613,497.60/920,246.40 = 520,185.60/x
  3. Step 3: Cross multiply
    613,497.60x = 920,246.40 × 520,185.60
  4. Step 4: Simplify right side
    613,497.60x = 478,698,925,731.84
  5. Step 5: Solve for x
    x = 478,698,925,731.84/613,497.60
  6. Step 6: Final answer
    x = 780,278.40

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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.