Home / 429,058,556.80-643,923,758.40-199,056,140.80

Finding the Fourth Proportional to 429,058,556.80, 643,923,758.40 and 199,056,140.80

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Solution

The fourth proportional to 429,058,556.80, 643,923,758.40 and 199,056,140.80 is: 298,740,058.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,058,556.80 : 643,923,758.40 = 199,056,140.80 : x
  2. Step 2: Convert to fraction form
    429,058,556.80/643,923,758.40 = 199,056,140.80/x
  3. Step 3: Cross multiply
    429,058,556.80x = 643,923,758.40 × 199,056,140.80
  4. Step 4: Simplify right side
    429,058,556.80x = 128,176,978,316,535,584
  5. Step 5: Solve for x
    x = 128,176,978,316,535,584/429,058,556.80
  6. Step 6: Final answer
    x = 298,740,058.40

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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.