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Finding the Fourth Proportional to 676,211.76, 933,170.76 and 389,729.88

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Solution

The fourth proportional to 676,211.76, 933,170.76 and 389,729.88 is: 537,826.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,211.76 : 933,170.76 = 389,729.88 : x
  2. Step 2: Convert to fraction form
    676,211.76/933,170.76 = 389,729.88/x
  3. Step 3: Cross multiply
    676,211.76x = 933,170.76 × 389,729.88
  4. Step 4: Simplify right side
    676,211.76x = 363,684,528,314.31
  5. Step 5: Solve for x
    x = 363,684,528,314.31/676,211.76
  6. Step 6: Final answer
    x = 537,826.39

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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.