Home / 287,712,087.40-431,568,131.10-261,352,613.80

Finding the Fourth Proportional to 287,712,087.40, 431,568,131.10 and 261,352,613.80

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Solution

The fourth proportional to 287,712,087.40, 431,568,131.10 and 261,352,613.80 is: 392,028,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,712,087.40 : 431,568,131.10 = 261,352,613.80 : x
  2. Step 2: Convert to fraction form
    287,712,087.40/431,568,131.10 = 261,352,613.80/x
  3. Step 3: Cross multiply
    287,712,087.40x = 431,568,131.10 × 261,352,613.80
  4. Step 4: Simplify right side
    287,712,087.40x = 112,791,459,095,766,080
  5. Step 5: Solve for x
    x = 112,791,459,095,766,080/287,712,087.40
  6. Step 6: Final answer
    x = 392,028,920.70

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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.