Home / 1,277,999.90-1,916,999.85-391,420.70

Finding the Fourth Proportional to 1,277,999.90, 1,916,999.85 and 391,420.70

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Solution

The fourth proportional to 1,277,999.90, 1,916,999.85 and 391,420.70 is: 587,131.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277,999.90 : 1,916,999.85 = 391,420.70 : x
  2. Step 2: Convert to fraction form
    1,277,999.90/1,916,999.85 = 391,420.70/x
  3. Step 3: Cross multiply
    1,277,999.90x = 1,916,999.85 × 391,420.70
  4. Step 4: Simplify right side
    1,277,999.90x = 750,353,423,186.90
  5. Step 5: Solve for x
    x = 750,353,423,186.90/1,277,999.90
  6. Step 6: Final answer
    x = 587,131.05

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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.