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Finding the Fourth Proportional to 478,715.56, 718,075.70 and 141,762.58

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Solution

The fourth proportional to 478,715.56, 718,075.70 and 141,762.58 is: 212,644.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,715.56 : 718,075.70 = 141,762.58 : x
  2. Step 2: Convert to fraction form
    478,715.56/718,075.70 = 141,762.58/x
  3. Step 3: Cross multiply
    478,715.56x = 718,075.70 × 141,762.58
  4. Step 4: Simplify right side
    478,715.56x = 101,796,263,867.31
  5. Step 5: Solve for x
    x = 101,796,263,867.31/478,715.56
  6. Step 6: Final answer
    x = 212,644.57

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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.