Home / 287,712,135.60-431,568,203.40-172,826,401.20

Finding the Fourth Proportional to 287,712,135.60, 431,568,203.40 and 172,826,401.20

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Solution

The fourth proportional to 287,712,135.60, 431,568,203.40 and 172,826,401.20 is: 259,239,601.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,135.60 : 431,568,203.40 = 172,826,401.20 : x
  2. Step 2: Convert to fraction form
    287,712,135.60/431,568,203.40 = 172,826,401.20/x
  3. Step 3: Cross multiply
    287,712,135.60x = 431,568,203.40 × 172,826,401.20
  4. Step 4: Simplify right side
    287,712,135.60x = 74,586,379,465,971,600
  5. Step 5: Solve for x
    x = 74,586,379,465,971,600/287,712,135.60
  6. Step 6: Final answer
    x = 259,239,601.80

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1.5x scale

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.