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Finding the Fourth Proportional to 526,072.80, 788,720.40 and 289,682.40

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Solution

The fourth proportional to 526,072.80, 788,720.40 and 289,682.40 is: 434,309.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,072.80 : 788,720.40 = 289,682.40 : x
  2. Step 2: Convert to fraction form
    526,072.80/788,720.40 = 289,682.40/x
  3. Step 3: Cross multiply
    526,072.80x = 788,720.40 × 289,682.40
  4. Step 4: Simplify right side
    526,072.80x = 228,478,418,400.96
  5. Step 5: Solve for x
    x = 228,478,418,400.96/526,072.80
  6. Step 6: Final answer
    x = 434,309.51

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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.