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Finding the Fourth Proportional to 716,202, 988,365.32 and 389,518

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Solution

The fourth proportional to 716,202, 988,365.32 and 389,518 is: 537,538.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,202 : 988,365.32 = 389,518 : x
  2. Step 2: Convert to fraction form
    716,202/988,365.32 = 389,518/x
  3. Step 3: Cross multiply
    716,202x = 988,365.32 × 389,518
  4. Step 4: Simplify right side
    716,202x = 384,986,082,715.76
  5. Step 5: Solve for x
    x = 384,986,082,715.76/716,202
  6. Step 6: Final answer
    x = 537,538.41

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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.