Home / 912,830.40-1,369,245.60-281,743.20

Finding the Fourth Proportional to 912,830.40, 1,369,245.60 and 281,743.20

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Solution

The fourth proportional to 912,830.40, 1,369,245.60 and 281,743.20 is: 422,614.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,830.40 : 1,369,245.60 = 281,743.20 : x
  2. Step 2: Convert to fraction form
    912,830.40/1,369,245.60 = 281,743.20/x
  3. Step 3: Cross multiply
    912,830.40x = 1,369,245.60 × 281,743.20
  4. Step 4: Simplify right side
    912,830.40x = 385,775,636,929.92
  5. Step 5: Solve for x
    x = 385,775,636,929.92/912,830.40
  6. Step 6: Final answer
    x = 422,614.80

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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.