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Finding the Fourth Proportional to 692,528.68, 955,690.50 and 390,750.76

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Solution

The fourth proportional to 692,528.68, 955,690.50 and 390,750.76 is: 539,236.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,528.68 : 955,690.50 = 390,750.76 : x
  2. Step 2: Convert to fraction form
    692,528.68/955,690.50 = 390,750.76/x
  3. Step 3: Cross multiply
    692,528.68x = 955,690.50 × 390,750.76
  4. Step 4: Simplify right side
    692,528.68x = 373,436,789,199.78
  5. Step 5: Solve for x
    x = 373,436,789,199.78/692,528.68
  6. Step 6: Final answer
    x = 539,236.57

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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.