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Finding the Fourth Proportional to 564,491.10, 779,006.55 and 309,865.50

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Solution

The fourth proportional to 564,491.10, 779,006.55 and 309,865.50 is: 427,619.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    564,491.10 : 779,006.55 = 309,865.50 : x
  2. Step 2: Convert to fraction form
    564,491.10/779,006.55 = 309,865.50/x
  3. Step 3: Cross multiply
    564,491.10x = 779,006.55 × 309,865.50
  4. Step 4: Simplify right side
    564,491.10x = 241,387,254,119.03
  5. Step 5: Solve for x
    x = 241,387,254,119.03/564,491.10
  6. Step 6: Final answer
    x = 427,619.24

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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.