Home / 428,875,786.60-643,313,679.90-357,450,116.20

Finding the Fourth Proportional to 428,875,786.60, 643,313,679.90 and 357,450,116.20

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Solution

The fourth proportional to 428,875,786.60, 643,313,679.90 and 357,450,116.20 is: 536,175,174.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,875,786.60 : 643,313,679.90 = 357,450,116.20 : x
  2. Step 2: Convert to fraction form
    428,875,786.60/643,313,679.90 = 357,450,116.20/x
  3. Step 3: Cross multiply
    428,875,786.60x = 643,313,679.90 × 357,450,116.20
  4. Step 4: Simplify right side
    428,875,786.60x = 229,952,549,633,304,576
  5. Step 5: Solve for x
    x = 229,952,549,633,304,576/428,875,786.60
  6. Step 6: Final answer
    x = 536,175,174.30

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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.