Home / 887,128.80-1,330,693.20-326,090.40

Finding the Fourth Proportional to 887,128.80, 1,330,693.20 and 326,090.40

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Solution

The fourth proportional to 887,128.80, 1,330,693.20 and 326,090.40 is: 489,135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    887,128.80 : 1,330,693.20 = 326,090.40 : x
  2. Step 2: Convert to fraction form
    887,128.80/1,330,693.20 = 326,090.40/x
  3. Step 3: Cross multiply
    887,128.80x = 1,330,693.20 × 326,090.40
  4. Step 4: Simplify right side
    887,128.80x = 433,926,277,865.28
  5. Step 5: Solve for x
    x = 433,926,277,865.28/887,128.80
  6. Step 6: Final answer
    x = 489,135.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.