Home / 989,140.80-1,387,946.40-989,140.80

Finding the Fourth Proportional to 989,140.80, 1,387,946.40 and 989,140.80

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Solution

The fourth proportional to 989,140.80, 1,387,946.40 and 989,140.80 is: 1,387,946.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,140.80 : 1,387,946.40 = 989,140.80 : x
  2. Step 2: Convert to fraction form
    989,140.80/1,387,946.40 = 989,140.80/x
  3. Step 3: Cross multiply
    989,140.80x = 1,387,946.40 × 989,140.80
  4. Step 4: Simplify right side
    989,140.80x = 1,372,874,412,453.12
  5. Step 5: Solve for x
    x = 1,372,874,412,453.12/989,140.80
  6. Step 6: Final answer
    x = 1,387,946.40

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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.