Home / 989,429.40-1,389,400.20-989,429.40

Finding the Fourth Proportional to 989,429.40, 1,389,400.20 and 989,429.40

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Solution

The fourth proportional to 989,429.40, 1,389,400.20 and 989,429.40 is: 1,389,400.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,429.40 : 1,389,400.20 = 989,429.40 : x
  2. Step 2: Convert to fraction form
    989,429.40/1,389,400.20 = 989,429.40/x
  3. Step 3: Cross multiply
    989,429.40x = 1,389,400.20 × 989,429.40
  4. Step 4: Simplify right side
    989,429.40x = 1,374,713,406,245.88
  5. Step 5: Solve for x
    x = 1,374,713,406,245.88/989,429.40
  6. Step 6: Final answer
    x = 1,389,400.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.