Home / 830,540.64-1,245,416.40-430,780.80

Finding the Fourth Proportional to 830,540.64, 1,245,416.40 and 430,780.80

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Solution

The fourth proportional to 830,540.64, 1,245,416.40 and 430,780.80 is: 645,966.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,540.64 : 1,245,416.40 = 430,780.80 : x
  2. Step 2: Convert to fraction form
    830,540.64/1,245,416.40 = 430,780.80/x
  3. Step 3: Cross multiply
    830,540.64x = 1,245,416.40 × 430,780.80
  4. Step 4: Simplify right side
    830,540.64x = 536,501,473,125.12
  5. Step 5: Solve for x
    x = 536,501,473,125.12/830,540.64
  6. Step 6: Final answer
    x = 645,966.55

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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.