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Finding the Fourth Proportional to 692,611.80, 955,641.96 and 420,672.12

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Solution

The fourth proportional to 692,611.80, 955,641.96 and 420,672.12 is: 580,428.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,611.80 : 955,641.96 = 420,672.12 : x
  2. Step 2: Convert to fraction form
    692,611.80/955,641.96 = 420,672.12/x
  3. Step 3: Cross multiply
    692,611.80x = 955,641.96 × 420,672.12
  4. Step 4: Simplify right side
    692,611.80x = 402,011,929,274.16
  5. Step 5: Solve for x
    x = 402,011,929,274.16/692,611.80
  6. Step 6: Final answer
    x = 580,428.93

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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.