Home / 644,983.12-890,004.38-386,870.57

Finding the Fourth Proportional to 644,983.12, 890,004.38 and 386,870.57

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Solution

The fourth proportional to 644,983.12, 890,004.38 and 386,870.57 is: 533,838.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,983.12 : 890,004.38 = 386,870.57 : x
  2. Step 2: Convert to fraction form
    644,983.12/890,004.38 = 386,870.57/x
  3. Step 3: Cross multiply
    644,983.12x = 890,004.38 × 386,870.57
  4. Step 4: Simplify right side
    644,983.12x = 344,316,501,793.10
  5. Step 5: Solve for x
    x = 344,316,501,793.10/644,983.12
  6. Step 6: Final answer
    x = 533,838.00

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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.