Home / 1,390,020-1,918,214.64-786,408

Finding the Fourth Proportional to 1,390,020, 1,918,214.64 and 786,408

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Solution

The fourth proportional to 1,390,020, 1,918,214.64 and 786,408 is: 1,085,235.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,020 : 1,918,214.64 = 786,408 : x
  2. Step 2: Convert to fraction form
    1,390,020/1,918,214.64 = 786,408/x
  3. Step 3: Cross multiply
    1,390,020x = 1,918,214.64 × 786,408
  4. Step 4: Simplify right side
    1,390,020x = 1,508,499,338,613.12
  5. Step 5: Solve for x
    x = 1,508,499,338,613.12/1,390,020
  6. Step 6: Final answer
    x = 1,085,235.71

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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.