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Finding the Fourth Proportional to 639,075.30, 958,547.31 and 339,237.60

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Solution

The fourth proportional to 639,075.30, 958,547.31 and 339,237.60 is: 508,821.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,075.30 : 958,547.31 = 339,237.60 : x
  2. Step 2: Convert to fraction form
    639,075.30/958,547.31 = 339,237.60/x
  3. Step 3: Cross multiply
    639,075.30x = 958,547.31 × 339,237.60
  4. Step 4: Simplify right side
    639,075.30x = 325,175,288,930.86
  5. Step 5: Solve for x
    x = 325,175,288,930.86/639,075.30
  6. Step 6: Final answer
    x = 508,821.56

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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.