Home / 393,362,406.40-542,825,892.16-217,146,619.20

Finding the Fourth Proportional to 393,362,406.40, 542,825,892.16 and 217,146,619.20

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Solution

The fourth proportional to 393,362,406.40, 542,825,892.16 and 217,146,619.20 is: 299,654,479.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,362,406.40 : 542,825,892.16 = 217,146,619.20 : x
  2. Step 2: Convert to fraction form
    393,362,406.40/542,825,892.16 = 217,146,619.20/x
  3. Step 3: Cross multiply
    393,362,406.40x = 542,825,892.16 × 217,146,619.20
  4. Step 4: Simplify right side
    393,362,406.40x = 117,872,807,296,767,776
  5. Step 5: Solve for x
    x = 117,872,807,296,767,776/393,362,406.40
  6. Step 6: Final answer
    x = 299,654,479.89

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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.