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Finding the Fourth Proportional to 564,420.72, 778,899.96 and 309,772.56

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Solution

The fourth proportional to 564,420.72, 778,899.96 and 309,772.56 is: 427,485.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,420.72 : 778,899.96 = 309,772.56 : x
  2. Step 2: Convert to fraction form
    564,420.72/778,899.96 = 309,772.56/x
  3. Step 3: Cross multiply
    564,420.72x = 778,899.96 × 309,772.56
  4. Step 4: Simplify right side
    564,420.72x = 241,281,834,593.10
  5. Step 5: Solve for x
    x = 241,281,834,593.10/564,420.72
  6. Step 6: Final answer
    x = 427,485.79

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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.