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Finding the Fourth Proportional to 819,771.60, 1,229,657.40 and 258,806.10

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Solution

The fourth proportional to 819,771.60, 1,229,657.40 and 258,806.10 is: 388,209.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,771.60 : 1,229,657.40 = 258,806.10 : x
  2. Step 2: Convert to fraction form
    819,771.60/1,229,657.40 = 258,806.10/x
  3. Step 3: Cross multiply
    819,771.60x = 1,229,657.40 × 258,806.10
  4. Step 4: Simplify right side
    819,771.60x = 318,242,836,030.14
  5. Step 5: Solve for x
    x = 318,242,836,030.14/819,771.60
  6. Step 6: Final answer
    x = 388,209.15

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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.