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Finding the Fourth Proportional to 478,910, 718,368.60 and 212,598.92

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Solution

The fourth proportional to 478,910, 718,368.60 and 212,598.92 is: 318,899.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,910 : 718,368.60 = 212,598.92 : x
  2. Step 2: Convert to fraction form
    478,910/718,368.60 = 212,598.92/x
  3. Step 3: Cross multiply
    478,910x = 718,368.60 × 212,598.92
  4. Step 4: Simplify right side
    478,910x = 152,724,388,521.91
  5. Step 5: Solve for x
    x = 152,724,388,521.91/478,910
  6. Step 6: Final answer
    x = 318,899.98

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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.