Home / 428,745,900.80-643,118,851.20-265,487,225.60

Finding the Fourth Proportional to 428,745,900.80, 643,118,851.20 and 265,487,225.60

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Solution

The fourth proportional to 428,745,900.80, 643,118,851.20 and 265,487,225.60 is: 398,230,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,745,900.80 : 643,118,851.20 = 265,487,225.60 : x
  2. Step 2: Convert to fraction form
    428,745,900.80/643,118,851.20 = 265,487,225.60/x
  3. Step 3: Cross multiply
    428,745,900.80x = 643,118,851.20 × 265,487,225.60
  4. Step 4: Simplify right side
    428,745,900.80x = 170,739,839,536,147,232
  5. Step 5: Solve for x
    x = 170,739,839,536,147,232/428,745,900.80
  6. Step 6: Final answer
    x = 398,230,838.40

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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.