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Finding the Fourth Proportional to 389,107.76, 536,968.70 and 210,259.76

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Solution

The fourth proportional to 389,107.76, 536,968.70 and 210,259.76 is: 290,158.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,107.76 : 536,968.70 = 210,259.76 : x
  2. Step 2: Convert to fraction form
    389,107.76/536,968.70 = 210,259.76/x
  3. Step 3: Cross multiply
    389,107.76x = 536,968.70 × 210,259.76
  4. Step 4: Simplify right side
    389,107.76x = 112,902,909,989.51
  5. Step 5: Solve for x
    x = 112,902,909,989.51/389,107.76
  6. Step 6: Final answer
    x = 290,158.46

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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.