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Finding the Fourth Proportional to 556,637.88, 768,232.71 and 311,715.90

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Solution

The fourth proportional to 556,637.88, 768,232.71 and 311,715.90 is: 430,208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,637.88 : 768,232.71 = 311,715.90 : x
  2. Step 2: Convert to fraction form
    556,637.88/768,232.71 = 311,715.90/x
  3. Step 3: Cross multiply
    556,637.88x = 768,232.71 × 311,715.90
  4. Step 4: Simplify right side
    556,637.88x = 239,470,350,607.09
  5. Step 5: Solve for x
    x = 239,470,350,607.09/556,637.88
  6. Step 6: Final answer
    x = 430,208.51

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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.