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Finding the Fourth Proportional to 657,926.60, 986,987.10 and 208,689.80

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Solution

The fourth proportional to 657,926.60, 986,987.10 and 208,689.80 is: 313,065.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,926.60 : 986,987.10 = 208,689.80 : x
  2. Step 2: Convert to fraction form
    657,926.60/986,987.10 = 208,689.80/x
  3. Step 3: Cross multiply
    657,926.60x = 986,987.10 × 208,689.80
  4. Step 4: Simplify right side
    657,926.60x = 205,974,140,501.58
  5. Step 5: Solve for x
    x = 205,974,140,501.58/657,926.60
  6. Step 6: Final answer
    x = 313,065.53

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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.