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Finding the Fourth Proportional to 468,075.80, 645,943.20 and 253,215.82

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Solution

The fourth proportional to 468,075.80, 645,943.20 and 253,215.82 is: 349,437.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    468,075.80 : 645,943.20 = 253,215.82 : x
  2. Step 2: Convert to fraction form
    468,075.80/645,943.20 = 253,215.82/x
  3. Step 3: Cross multiply
    468,075.80x = 645,943.20 × 253,215.82
  4. Step 4: Simplify right side
    468,075.80x = 163,563,037,061.42
  5. Step 5: Solve for x
    x = 163,563,037,061.42/468,075.80
  6. Step 6: Final answer
    x = 349,437.07

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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.