Home / 525,631.60-788,447.40-420,655.60

Finding the Fourth Proportional to 525,631.60, 788,447.40 and 420,655.60

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Solution

The fourth proportional to 525,631.60, 788,447.40 and 420,655.60 is: 630,983.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,631.60 : 788,447.40 = 420,655.60 : x
  2. Step 2: Convert to fraction form
    525,631.60/788,447.40 = 420,655.60/x
  3. Step 3: Cross multiply
    525,631.60x = 788,447.40 × 420,655.60
  4. Step 4: Simplify right side
    525,631.60x = 331,664,814,115.44
  5. Step 5: Solve for x
    x = 331,664,814,115.44/525,631.60
  6. Step 6: Final answer
    x = 630,983.40

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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.