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Finding the Fourth Proportional to 710,290.12, 980,162.88 and 387,995.56

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Solution

The fourth proportional to 710,290.12, 980,162.88 and 387,995.56 is: 535,413.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,290.12 : 980,162.88 = 387,995.56 : x
  2. Step 2: Convert to fraction form
    710,290.12/980,162.88 = 387,995.56/x
  3. Step 3: Cross multiply
    710,290.12x = 980,162.88 × 387,995.56
  4. Step 4: Simplify right side
    710,290.12x = 380,298,845,516.81
  5. Step 5: Solve for x
    x = 380,298,845,516.81/710,290.12
  6. Step 6: Final answer
    x = 535,413.40

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Similar ratio
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1.5x scale

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.