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Finding the Fourth Proportional to 389,757.20, 537,866.55 and 210,909.20

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Solution

The fourth proportional to 389,757.20, 537,866.55 and 210,909.20 is: 291,055.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,757.20 : 537,866.55 = 210,909.20 : x
  2. Step 2: Convert to fraction form
    389,757.20/537,866.55 = 210,909.20/x
  3. Step 3: Cross multiply
    389,757.20x = 537,866.55 × 210,909.20
  4. Step 4: Simplify right side
    389,757.20x = 113,441,001,077.93
  5. Step 5: Solve for x
    x = 113,441,001,077.93/389,757.20
  6. Step 6: Final answer
    x = 291,055.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.