Home / 1,287,988.20-1,931,982.30-910,074.60

Finding the Fourth Proportional to 1,287,988.20, 1,931,982.30 and 910,074.60

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Solution

The fourth proportional to 1,287,988.20, 1,931,982.30 and 910,074.60 is: 1,365,111.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,988.20 : 1,931,982.30 = 910,074.60 : x
  2. Step 2: Convert to fraction form
    1,287,988.20/1,931,982.30 = 910,074.60/x
  3. Step 3: Cross multiply
    1,287,988.20x = 1,931,982.30 × 910,074.60
  4. Step 4: Simplify right side
    1,287,988.20x = 1,758,248,018,879.58
  5. Step 5: Solve for x
    x = 1,758,248,018,879.58/1,287,988.20
  6. Step 6: Final answer
    x = 1,365,111.90

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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.