Home / 458,566.12-686,879.58-289,999.72

Finding the Fourth Proportional to 458,566.12, 686,879.58 and 289,999.72

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Solution

The fourth proportional to 458,566.12, 686,879.58 and 289,999.72 is: 434,386.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,566.12 : 686,879.58 = 289,999.72 : x
  2. Step 2: Convert to fraction form
    458,566.12/686,879.58 = 289,999.72/x
  3. Step 3: Cross multiply
    458,566.12x = 686,879.58 × 289,999.72
  4. Step 4: Simplify right side
    458,566.12x = 199,194,885,873.72
  5. Step 5: Solve for x
    x = 199,194,885,873.72/458,566.12
  6. Step 6: Final answer
    x = 434,386.40

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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.