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Finding the Fourth Proportional to 644,676.40, 889,377.86 and 402,794.20

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Solution

The fourth proportional to 644,676.40, 889,377.86 and 402,794.20 is: 555,683.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,676.40 : 889,377.86 = 402,794.20 : x
  2. Step 2: Convert to fraction form
    644,676.40/889,377.86 = 402,794.20/x
  3. Step 3: Cross multiply
    644,676.40x = 889,377.86 × 402,794.20
  4. Step 4: Simplify right side
    644,676.40x = 358,236,243,616.41
  5. Step 5: Solve for x
    x = 358,236,243,616.41/644,676.40
  6. Step 6: Final answer
    x = 555,683.82

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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.