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Finding the Fourth Proportional to 423,322.80, 634,984.20 and 186,543.60

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Solution

The fourth proportional to 423,322.80, 634,984.20 and 186,543.60 is: 279,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,322.80 : 634,984.20 = 186,543.60 : x
  2. Step 2: Convert to fraction form
    423,322.80/634,984.20 = 186,543.60/x
  3. Step 3: Cross multiply
    423,322.80x = 634,984.20 × 186,543.60
  4. Step 4: Simplify right side
    423,322.80x = 118,452,238,611.12
  5. Step 5: Solve for x
    x = 118,452,238,611.12/423,322.80
  6. Step 6: Final answer
    x = 279,815.40

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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.