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Finding the Fourth Proportional to 668,925.21, 923,117.40 and 382,451.28

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Solution

The fourth proportional to 668,925.21, 923,117.40 and 382,451.28 is: 527,783.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,925.21 : 923,117.40 = 382,451.28 : x
  2. Step 2: Convert to fraction form
    668,925.21/923,117.40 = 382,451.28/x
  3. Step 3: Cross multiply
    668,925.21x = 923,117.40 × 382,451.28
  4. Step 4: Simplify right side
    668,925.21x = 353,047,431,220.27
  5. Step 5: Solve for x
    x = 353,047,431,220.27/668,925.21
  6. Step 6: Final answer
    x = 527,783.12

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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.