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Finding the Fourth Proportional to 478,290.75, 660,087.81 and 357,221.82

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Solution

The fourth proportional to 478,290.75, 660,087.81 and 357,221.82 is: 493,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,290.75 : 660,087.81 = 357,221.82 : x
  2. Step 2: Convert to fraction form
    478,290.75/660,087.81 = 357,221.82/x
  3. Step 3: Cross multiply
    478,290.75x = 660,087.81 × 357,221.82
  4. Step 4: Simplify right side
    478,290.75x = 235,797,768,848.01
  5. Step 5: Solve for x
    x = 235,797,768,848.01/478,290.75
  6. Step 6: Final answer
    x = 493,000.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.