Home / 1,391,021.10-1,919,681.19-779,138.10

Finding the Fourth Proportional to 1,391,021.10, 1,919,681.19 and 779,138.10

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Solution

The fourth proportional to 1,391,021.10, 1,919,681.19 and 779,138.10 is: 1,075,250.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,021.10 : 1,919,681.19 = 779,138.10 : x
  2. Step 2: Convert to fraction form
    1,391,021.10/1,919,681.19 = 779,138.10/x
  3. Step 3: Cross multiply
    1,391,021.10x = 1,919,681.19 × 779,138.10
  4. Step 4: Simplify right side
    1,391,021.10x = 1,495,696,754,982.34
  5. Step 5: Solve for x
    x = 1,495,696,754,982.34/1,391,021.10
  6. Step 6: Final answer
    x = 1,075,250.95

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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.