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Finding the Fourth Proportional to 572,783.92, 790,419.84 and 318,151.36

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Solution

The fourth proportional to 572,783.92, 790,419.84 and 318,151.36 is: 439,036.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,783.92 : 790,419.84 = 318,151.36 : x
  2. Step 2: Convert to fraction form
    572,783.92/790,419.84 = 318,151.36/x
  3. Step 3: Cross multiply
    572,783.92x = 790,419.84 × 318,151.36
  4. Step 4: Simplify right side
    572,783.92x = 251,473,147,066.98
  5. Step 5: Solve for x
    x = 251,473,147,066.98/572,783.92
  6. Step 6: Final answer
    x = 439,036.67

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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.