Home / 858,806.40-1,288,209.60-438,027.60

Finding the Fourth Proportional to 858,806.40, 1,288,209.60 and 438,027.60

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Solution

The fourth proportional to 858,806.40, 1,288,209.60 and 438,027.60 is: 657,041.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,806.40 : 1,288,209.60 = 438,027.60 : x
  2. Step 2: Convert to fraction form
    858,806.40/1,288,209.60 = 438,027.60/x
  3. Step 3: Cross multiply
    858,806.40x = 1,288,209.60 × 438,027.60
  4. Step 4: Simplify right side
    858,806.40x = 564,271,359,384.96
  5. Step 5: Solve for x
    x = 564,271,359,384.96/858,806.40
  6. Step 6: Final answer
    x = 657,041.40

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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.