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Finding the Fourth Proportional to 628,963.94, 867,754.40 and 357,011.30

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Solution

The fourth proportional to 628,963.94, 867,754.40 and 357,011.30 is: 492,553.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,963.94 : 867,754.40 = 357,011.30 : x
  2. Step 2: Convert to fraction form
    628,963.94/867,754.40 = 357,011.30/x
  3. Step 3: Cross multiply
    628,963.94x = 867,754.40 × 357,011.30
  4. Step 4: Simplify right side
    628,963.94x = 309,798,126,424.72
  5. Step 5: Solve for x
    x = 309,798,126,424.72/628,963.94
  6. Step 6: Final answer
    x = 492,553.08

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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.