Home / 853,897.80-1,279,809.90-380,080.20

Finding the Fourth Proportional to 853,897.80, 1,279,809.90 and 380,080.20

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Solution

The fourth proportional to 853,897.80, 1,279,809.90 and 380,080.20 is: 569,658.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,897.80 : 1,279,809.90 = 380,080.20 : x
  2. Step 2: Convert to fraction form
    853,897.80/1,279,809.90 = 380,080.20/x
  3. Step 3: Cross multiply
    853,897.80x = 1,279,809.90 × 380,080.20
  4. Step 4: Simplify right side
    853,897.80x = 486,430,402,753.98
  5. Step 5: Solve for x
    x = 486,430,402,753.98/853,897.80
  6. Step 6: Final answer
    x = 569,658.81

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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.