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Finding the Fourth Proportional to 628,475.51, 867,315.84 and 356,554.88

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Solution

The fourth proportional to 628,475.51, 867,315.84 and 356,554.88 is: 492,056.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,475.51 : 867,315.84 = 356,554.88 : x
  2. Step 2: Convert to fraction form
    628,475.51/867,315.84 = 356,554.88/x
  3. Step 3: Cross multiply
    628,475.51x = 867,315.84 × 356,554.88
  4. Step 4: Simplify right side
    628,475.51x = 309,245,695,253.30
  5. Step 5: Solve for x
    x = 309,245,695,253.30/628,475.51
  6. Step 6: Final answer
    x = 492,056.87

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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.