Home / 393,379,412.63-542,849,330.79-217,163,615.36

Finding the Fourth Proportional to 393,379,412.63, 542,849,330.79 and 217,163,615.36

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Solution

The fourth proportional to 393,379,412.63, 542,849,330.79 and 217,163,615.36 is: 299,677,917.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,379,412.63 : 542,849,330.79 = 217,163,615.36 : x
  2. Step 2: Convert to fraction form
    393,379,412.63/542,849,330.79 = 217,163,615.36/x
  3. Step 3: Cross multiply
    393,379,412.63x = 542,849,330.79 × 217,163,615.36
  4. Step 4: Simplify right side
    393,379,412.63x = 117,887,123,267,398,704
  5. Step 5: Solve for x
    x = 117,887,123,267,398,704/393,379,412.63
  6. Step 6: Final answer
    x = 299,677,917.77

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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.