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Finding the Fourth Proportional to 389,803, 537,928.41 and 210,955

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Solution

The fourth proportional to 389,803, 537,928.41 and 210,955 is: 291,118.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,803 : 537,928.41 = 210,955 : x
  2. Step 2: Convert to fraction form
    389,803/537,928.41 = 210,955/x
  3. Step 3: Cross multiply
    389,803x = 537,928.41 × 210,955
  4. Step 4: Simplify right side
    389,803x = 113,478,687,731.55
  5. Step 5: Solve for x
    x = 113,478,687,731.55/389,803
  6. Step 6: Final answer
    x = 291,118.05

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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.