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Finding the Fourth Proportional to 469,940.20, 648,499.98 and 255,075.64

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Solution

The fourth proportional to 469,940.20, 648,499.98 and 255,075.64 is: 351,994.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,940.20 : 648,499.98 = 255,075.64 : x
  2. Step 2: Convert to fraction form
    469,940.20/648,499.98 = 255,075.64/x
  3. Step 3: Cross multiply
    469,940.20x = 648,499.98 × 255,075.64
  4. Step 4: Simplify right side
    469,940.20x = 165,416,547,438.49
  5. Step 5: Solve for x
    x = 165,416,547,438.49/469,940.20
  6. Step 6: Final answer
    x = 351,994.89

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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.