Home / 811,903.20-1,217,854.80-778,725.60

Finding the Fourth Proportional to 811,903.20, 1,217,854.80 and 778,725.60

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Solution

The fourth proportional to 811,903.20, 1,217,854.80 and 778,725.60 is: 1,168,088.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,903.20 : 1,217,854.80 = 778,725.60 : x
  2. Step 2: Convert to fraction form
    811,903.20/1,217,854.80 = 778,725.60/x
  3. Step 3: Cross multiply
    811,903.20x = 1,217,854.80 × 778,725.60
  4. Step 4: Simplify right side
    811,903.20x = 948,374,709,842.88
  5. Step 5: Solve for x
    x = 948,374,709,842.88/811,903.20
  6. Step 6: Final answer
    x = 1,168,088.40

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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.