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Finding the Fourth Proportional to 423,094.60, 634,623.90 and 142,611.40

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Solution

The fourth proportional to 423,094.60, 634,623.90 and 142,611.40 is: 213,911.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,094.60 : 634,623.90 = 142,611.40 : x
  2. Step 2: Convert to fraction form
    423,094.60/634,623.90 = 142,611.40/x
  3. Step 3: Cross multiply
    423,094.60x = 634,623.90 × 142,611.40
  4. Step 4: Simplify right side
    423,094.60x = 90,504,602,852.46
  5. Step 5: Solve for x
    x = 90,504,602,852.46/423,094.60
  6. Step 6: Final answer
    x = 213,911.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.