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Finding the Fourth Proportional to 389,507.50, 537,520.35 and 210,659.50

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Solution

The fourth proportional to 389,507.50, 537,520.35 and 210,659.50 is: 290,710.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,507.50 : 537,520.35 = 210,659.50 : x
  2. Step 2: Convert to fraction form
    389,507.50/537,520.35 = 210,659.50/x
  3. Step 3: Cross multiply
    389,507.50x = 537,520.35 × 210,659.50
  4. Step 4: Simplify right side
    389,507.50x = 113,233,768,170.83
  5. Step 5: Solve for x
    x = 113,233,768,170.83/389,507.50
  6. Step 6: Final answer
    x = 290,710.11

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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.