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Finding the Fourth Proportional to 559,179.74, 771,689.88 and 317,484.80

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Solution

The fourth proportional to 559,179.74, 771,689.88 and 317,484.80 is: 438,141.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,179.74 : 771,689.88 = 317,484.80 : x
  2. Step 2: Convert to fraction form
    559,179.74/771,689.88 = 317,484.80/x
  3. Step 3: Cross multiply
    559,179.74x = 771,689.88 × 317,484.80
  4. Step 4: Simplify right side
    559,179.74x = 244,999,803,355.38
  5. Step 5: Solve for x
    x = 244,999,803,355.38/559,179.74
  6. Step 6: Final answer
    x = 438,141.42

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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.