Home / 1,390,044-1,918,247.76-786,432

Finding the Fourth Proportional to 1,390,044, 1,918,247.76 and 786,432

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Solution

The fourth proportional to 1,390,044, 1,918,247.76 and 786,432 is: 1,085,268.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,044 : 1,918,247.76 = 786,432 : x
  2. Step 2: Convert to fraction form
    1,390,044/1,918,247.76 = 786,432/x
  3. Step 3: Cross multiply
    1,390,044x = 1,918,247.76 × 786,432
  4. Step 4: Simplify right side
    1,390,044x = 1,508,571,422,392.32
  5. Step 5: Solve for x
    x = 1,508,571,422,392.32/1,390,044
  6. Step 6: Final answer
    x = 1,085,268.83

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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.