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Finding the Fourth Proportional to 875,240.40, 1,312,860.60 and 520,071.60

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Solution

The fourth proportional to 875,240.40, 1,312,860.60 and 520,071.60 is: 780,107.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    875,240.40 : 1,312,860.60 = 520,071.60 : x
  2. Step 2: Convert to fraction form
    875,240.40/1,312,860.60 = 520,071.60/x
  3. Step 3: Cross multiply
    875,240.40x = 1,312,860.60 × 520,071.60
  4. Step 4: Simplify right side
    875,240.40x = 682,781,512,818.96
  5. Step 5: Solve for x
    x = 682,781,512,818.96/875,240.40
  6. Step 6: Final answer
    x = 780,107.40

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Similar ratio
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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.