Home / 871,809.90-1,202,946.03-489,852.78

Finding the Fourth Proportional to 871,809.90, 1,202,946.03 and 489,852.78

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Solution

The fourth proportional to 871,809.90, 1,202,946.03 and 489,852.78 is: 675,911.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,809.90 : 1,202,946.03 = 489,852.78 : x
  2. Step 2: Convert to fraction form
    871,809.90/1,202,946.03 = 489,852.78/x
  3. Step 3: Cross multiply
    871,809.90x = 1,202,946.03 × 489,852.78
  4. Step 4: Simplify right side
    871,809.90x = 589,266,456,985.46
  5. Step 5: Solve for x
    x = 589,266,456,985.46/871,809.90
  6. Step 6: Final answer
    x = 675,911.64

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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.