Home / 866,430.90-1,298,771.55-393,455.70

Finding the Fourth Proportional to 866,430.90, 1,298,771.55 and 393,455.70

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Solution

The fourth proportional to 866,430.90, 1,298,771.55 and 393,455.70 is: 589,786.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,430.90 : 1,298,771.55 = 393,455.70 : x
  2. Step 2: Convert to fraction form
    866,430.90/1,298,771.55 = 393,455.70/x
  3. Step 3: Cross multiply
    866,430.90x = 1,298,771.55 × 393,455.70
  4. Step 4: Simplify right side
    866,430.90x = 511,009,069,345.34
  5. Step 5: Solve for x
    x = 511,009,069,345.34/866,430.90
  6. Step 6: Final answer
    x = 589,786.29

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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.