Home / 871,643.18-1,202,979.66-489,670.40

Finding the Fourth Proportional to 871,643.18, 1,202,979.66 and 489,670.40

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Solution

The fourth proportional to 871,643.18, 1,202,979.66 and 489,670.40 is: 675,808.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,643.18 : 1,202,979.66 = 489,670.40 : x
  2. Step 2: Convert to fraction form
    871,643.18/1,202,979.66 = 489,670.40/x
  3. Step 3: Cross multiply
    871,643.18x = 1,202,979.66 × 489,670.40
  4. Step 4: Simplify right side
    871,643.18x = 589,063,531,304.06
  5. Step 5: Solve for x
    x = 589,063,531,304.06/871,643.18
  6. Step 6: Final answer
    x = 675,808.11

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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.