Home / 1,390,019.50-1,918,213.95-786,407.50

Finding the Fourth Proportional to 1,390,019.50, 1,918,213.95 and 786,407.50

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Solution

The fourth proportional to 1,390,019.50, 1,918,213.95 and 786,407.50 is: 1,085,235.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,019.50 : 1,918,213.95 = 786,407.50 : x
  2. Step 2: Convert to fraction form
    1,390,019.50/1,918,213.95 = 786,407.50/x
  3. Step 3: Cross multiply
    1,390,019.50x = 1,918,213.95 × 786,407.50
  4. Step 4: Simplify right side
    1,390,019.50x = 1,508,497,836,884.63
  5. Step 5: Solve for x
    x = 1,508,497,836,884.63/1,390,019.50
  6. Step 6: Final answer
    x = 1,085,235.02

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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.