Home / 915,999.40-1,374,128.70-284,847.40

Finding the Fourth Proportional to 915,999.40, 1,374,128.70 and 284,847.40

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Solution

The fourth proportional to 915,999.40, 1,374,128.70 and 284,847.40 is: 427,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,999.40 : 1,374,128.70 = 284,847.40 : x
  2. Step 2: Convert to fraction form
    915,999.40/1,374,128.70 = 284,847.40/x
  3. Step 3: Cross multiply
    915,999.40x = 1,374,128.70 × 284,847.40
  4. Step 4: Simplify right side
    915,999.40x = 391,416,987,460.38
  5. Step 5: Solve for x
    x = 391,416,987,460.38/915,999.40
  6. Step 6: Final answer
    x = 427,311.40

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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.