Home / 1,390,045-1,918,249.14-786,433

Finding the Fourth Proportional to 1,390,045, 1,918,249.14 and 786,433

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Solution

The fourth proportional to 1,390,045, 1,918,249.14 and 786,433 is: 1,085,270.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,045 : 1,918,249.14 = 786,433 : x
  2. Step 2: Convert to fraction form
    1,390,045/1,918,249.14 = 786,433/x
  3. Step 3: Cross multiply
    1,390,045x = 1,918,249.14 × 786,433
  4. Step 4: Simplify right side
    1,390,045x = 1,508,574,425,917.62
  5. Step 5: Solve for x
    x = 1,508,574,425,917.62/1,390,045
  6. Step 6: Final answer
    x = 1,085,270.21

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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.