Home / 287,712,031.80-431,568,047.70-259,942,380.60

Finding the Fourth Proportional to 287,712,031.80, 431,568,047.70 and 259,942,380.60

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Solution

The fourth proportional to 287,712,031.80, 431,568,047.70 and 259,942,380.60 is: 389,913,570.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,031.80 : 431,568,047.70 = 259,942,380.60 : x
  2. Step 2: Convert to fraction form
    287,712,031.80/431,568,047.70 = 259,942,380.60/x
  3. Step 3: Cross multiply
    287,712,031.80x = 431,568,047.70 × 259,942,380.60
  4. Step 4: Simplify right side
    287,712,031.80x = 112,182,825,710,032,352
  5. Step 5: Solve for x
    x = 112,182,825,710,032,352/287,712,031.80
  6. Step 6: Final answer
    x = 389,913,570.90

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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.