Home / 1,289,878.60-1,779,352.50-766,290.28

Finding the Fourth Proportional to 1,289,878.60, 1,779,352.50 and 766,290.28

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Solution

The fourth proportional to 1,289,878.60, 1,779,352.50 and 766,290.28 is: 1,057,076.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,878.60 : 1,779,352.50 = 766,290.28 : x
  2. Step 2: Convert to fraction form
    1,289,878.60/1,779,352.50 = 766,290.28/x
  3. Step 3: Cross multiply
    1,289,878.60x = 1,779,352.50 × 766,290.28
  4. Step 4: Simplify right side
    1,289,878.60x = 1,363,500,525,443.70
  5. Step 5: Solve for x
    x = 1,363,500,525,443.70/1,289,878.60
  6. Step 6: Final answer
    x = 1,057,076.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.