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Finding the Fourth Proportional to 385,561.64, 532,075 and 215,795.76

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Solution

The fourth proportional to 385,561.64, 532,075 and 215,795.76 is: 297,798.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,561.64 : 532,075 = 215,795.76 : x
  2. Step 2: Convert to fraction form
    385,561.64/532,075 = 215,795.76/x
  3. Step 3: Cross multiply
    385,561.64x = 532,075 × 215,795.76
  4. Step 4: Simplify right side
    385,561.64x = 114,819,529,002
  5. Step 5: Solve for x
    x = 114,819,529,002/385,561.64
  6. Step 6: Final answer
    x = 297,798.11

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1.5x scale

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.