Home / 811,442.80-1,217,164.20-528,007.60

Finding the Fourth Proportional to 811,442.80, 1,217,164.20 and 528,007.60

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Solution

The fourth proportional to 811,442.80, 1,217,164.20 and 528,007.60 is: 792,011.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,442.80 : 1,217,164.20 = 528,007.60 : x
  2. Step 2: Convert to fraction form
    811,442.80/1,217,164.20 = 528,007.60/x
  3. Step 3: Cross multiply
    811,442.80x = 1,217,164.20 × 528,007.60
  4. Step 4: Simplify right side
    811,442.80x = 642,671,948,047.92
  5. Step 5: Solve for x
    x = 642,671,948,047.92/811,442.80
  6. Step 6: Final answer
    x = 792,011.40

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Similar ratio
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1.5x scale

Why These Related Problems?

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