Home / 393,343,872.72-542,844,590.04-217,165,801.20

Finding the Fourth Proportional to 393,343,872.72, 542,844,590.04 and 217,165,801.20

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Solution

The fourth proportional to 393,343,872.72, 542,844,590.04 and 217,165,801.20 is: 299,705,393.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,343,872.72 : 542,844,590.04 = 217,165,801.20 : x
  2. Step 2: Convert to fraction form
    393,343,872.72/542,844,590.04 = 217,165,801.20/x
  3. Step 3: Cross multiply
    393,343,872.72x = 542,844,590.04 × 217,165,801.20
  4. Step 4: Simplify right side
    393,343,872.72x = 117,887,280,323,122,128
  5. Step 5: Solve for x
    x = 117,887,280,323,122,128/393,343,872.72
  6. Step 6: Final answer
    x = 299,705,393.93

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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.