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Finding the Fourth Proportional to 458,698.20, 687,609.90 and 357,440.10

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Solution

The fourth proportional to 458,698.20, 687,609.90 and 357,440.10 is: 535,819.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,698.20 : 687,609.90 = 357,440.10 : x
  2. Step 2: Convert to fraction form
    458,698.20/687,609.90 = 357,440.10/x
  3. Step 3: Cross multiply
    458,698.20x = 687,609.90 × 357,440.10
  4. Step 4: Simplify right side
    458,698.20x = 245,779,351,416.99
  5. Step 5: Solve for x
    x = 245,779,351,416.99/458,698.20
  6. Step 6: Final answer
    x = 535,819.31

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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.