Home / 644,963.28-890,029.72-369,312.18

Finding the Fourth Proportional to 644,963.28, 890,029.72 and 369,312.18

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Solution

The fourth proportional to 644,963.28, 890,029.72 and 369,312.18 is: 509,639.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,963.28 : 890,029.72 = 369,312.18 : x
  2. Step 2: Convert to fraction form
    644,963.28/890,029.72 = 369,312.18/x
  3. Step 3: Cross multiply
    644,963.28x = 890,029.72 × 369,312.18
  4. Step 4: Simplify right side
    644,963.28x = 328,698,816,157.99
  5. Step 5: Solve for x
    x = 328,698,816,157.99/644,963.28
  6. Step 6: Final answer
    x = 509,639.58

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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.