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Finding the Fourth Proportional to 679,792.40, 1,019,980.20 and 347,368.40

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Solution

The fourth proportional to 679,792.40, 1,019,980.20 and 347,368.40 is: 521,201.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,792.40 : 1,019,980.20 = 347,368.40 : x
  2. Step 2: Convert to fraction form
    679,792.40/1,019,980.20 = 347,368.40/x
  3. Step 3: Cross multiply
    679,792.40x = 1,019,980.20 × 347,368.40
  4. Step 4: Simplify right side
    679,792.40x = 354,308,890,105.68
  5. Step 5: Solve for x
    x = 354,308,890,105.68/679,792.40
  6. Step 6: Final answer
    x = 521,201.61

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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.