Home / 989,438.40-1,389,412.80-989,438.40

Finding the Fourth Proportional to 989,438.40, 1,389,412.80 and 989,438.40

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Solution

The fourth proportional to 989,438.40, 1,389,412.80 and 989,438.40 is: 1,389,412.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,438.40 : 1,389,412.80 = 989,438.40 : x
  2. Step 2: Convert to fraction form
    989,438.40/1,389,412.80 = 989,438.40/x
  3. Step 3: Cross multiply
    989,438.40x = 1,389,412.80 × 989,438.40
  4. Step 4: Simplify right side
    989,438.40x = 1,374,738,377,771.52
  5. Step 5: Solve for x
    x = 1,374,738,377,771.52/989,438.40
  6. Step 6: Final answer
    x = 1,389,412.80

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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.