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Finding the Fourth Proportional to 478,415.70, 717,623.55 and 455,087.70

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Solution

The fourth proportional to 478,415.70, 717,623.55 and 455,087.70 is: 682,631.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,415.70 : 717,623.55 = 455,087.70 : x
  2. Step 2: Convert to fraction form
    478,415.70/717,623.55 = 455,087.70/x
  3. Step 3: Cross multiply
    478,415.70x = 717,623.55 × 455,087.70
  4. Step 4: Simplify right side
    478,415.70x = 326,581,650,835.34
  5. Step 5: Solve for x
    x = 326,581,650,835.34/478,415.70
  6. Step 6: Final answer
    x = 682,631.55

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Similar ratio
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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.