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Finding the Fourth Proportional to 458,554.87, 687,470.52 and 289,719.38

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Solution

The fourth proportional to 458,554.87, 687,470.52 and 289,719.38 is: 434,350.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,554.87 : 687,470.52 = 289,719.38 : x
  2. Step 2: Convert to fraction form
    458,554.87/687,470.52 = 289,719.38/x
  3. Step 3: Cross multiply
    458,554.87x = 687,470.52 × 289,719.38
  4. Step 4: Simplify right side
    458,554.87x = 199,173,535,627.80
  5. Step 5: Solve for x
    x = 199,173,535,627.80/458,554.87
  6. Step 6: Final answer
    x = 434,350.50

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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.