Home / 1,390,010.46-1,918,254.87-786,385.50

Finding the Fourth Proportional to 1,390,010.46, 1,918,254.87 and 786,385.50

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Solution

The fourth proportional to 1,390,010.46, 1,918,254.87 and 786,385.50 is: 1,085,234.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,010.46 : 1,918,254.87 = 786,385.50 : x
  2. Step 2: Convert to fraction form
    1,390,010.46/1,918,254.87 = 786,385.50/x
  3. Step 3: Cross multiply
    1,390,010.46x = 1,918,254.87 × 786,385.50
  4. Step 4: Simplify right side
    1,390,010.46x = 1,508,487,815,072.39
  5. Step 5: Solve for x
    x = 1,508,487,815,072.39/1,390,010.46
  6. Step 6: Final answer
    x = 1,085,234.87

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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.