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Finding the Fourth Proportional to 389,307.75, 537,245.42 and 210,459.75

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Solution

The fourth proportional to 389,307.75, 537,245.42 and 210,459.75 is: 290,434.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,307.75 : 537,245.42 = 210,459.75 : x
  2. Step 2: Convert to fraction form
    389,307.75/537,245.42 = 210,459.75/x
  3. Step 3: Cross multiply
    389,307.75x = 537,245.42 × 210,459.75
  4. Step 4: Simplify right side
    389,307.75x = 113,068,535,729.55
  5. Step 5: Solve for x
    x = 113,068,535,729.55/389,307.75
  6. Step 6: Final answer
    x = 290,434.84

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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.