Home / 853,817.80-1,279,041.90-433,395.40

Finding the Fourth Proportional to 853,817.80, 1,279,041.90 and 433,395.40

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Solution

The fourth proportional to 853,817.80, 1,279,041.90 and 433,395.40 is: 649,237.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,817.80 : 1,279,041.90 = 433,395.40 : x
  2. Step 2: Convert to fraction form
    853,817.80/1,279,041.90 = 433,395.40/x
  3. Step 3: Cross multiply
    853,817.80x = 1,279,041.90 × 433,395.40
  4. Step 4: Simplify right side
    853,817.80x = 554,330,875,867.26
  5. Step 5: Solve for x
    x = 554,330,875,867.26/853,817.80
  6. Step 6: Final answer
    x = 649,237.90

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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.