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Finding the Fourth Proportional to 579,726.36, 869,839.92 and 313,674.30

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Solution

The fourth proportional to 579,726.36, 869,839.92 and 313,674.30 is: 470,646.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,726.36 : 869,839.92 = 313,674.30 : x
  2. Step 2: Convert to fraction form
    579,726.36/869,839.92 = 313,674.30/x
  3. Step 3: Cross multiply
    579,726.36x = 869,839.92 × 313,674.30
  4. Step 4: Simplify right side
    579,726.36x = 272,846,428,018.06
  5. Step 5: Solve for x
    x = 272,846,428,018.06/579,726.36
  6. Step 6: Final answer
    x = 470,646.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.