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Finding the Fourth Proportional to 628,807.48, 867,497.94 and 387,017.08

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Solution

The fourth proportional to 628,807.48, 867,497.94 and 387,017.08 is: 533,925.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,807.48 : 867,497.94 = 387,017.08 : x
  2. Step 2: Convert to fraction form
    628,807.48/867,497.94 = 387,017.08/x
  3. Step 3: Cross multiply
    628,807.48x = 867,497.94 × 387,017.08
  4. Step 4: Simplify right side
    628,807.48x = 335,736,519,644.82
  5. Step 5: Solve for x
    x = 335,736,519,644.82/628,807.48
  6. Step 6: Final answer
    x = 533,925.77

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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.