Home / 644,920.17-889,983.41-358,434.10

Finding the Fourth Proportional to 644,920.17, 889,983.41 and 358,434.10

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Solution

The fourth proportional to 644,920.17, 889,983.41 and 358,434.10 is: 494,635.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,920.17 : 889,983.41 = 358,434.10 : x
  2. Step 2: Convert to fraction form
    644,920.17/889,983.41 = 358,434.10/x
  3. Step 3: Cross multiply
    644,920.17x = 889,983.41 × 358,434.10
  4. Step 4: Simplify right side
    644,920.17x = 319,000,402,578.28
  5. Step 5: Solve for x
    x = 319,000,402,578.28/644,920.17
  6. Step 6: Final answer
    x = 494,635.49

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1.5x scale

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.