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Finding the Fourth Proportional to 553,574.94, 763,775.37 and 311,772.93

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Solution

The fourth proportional to 553,574.94, 763,775.37 and 311,772.93 is: 430,157.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,574.94 : 763,775.37 = 311,772.93 : x
  2. Step 2: Convert to fraction form
    553,574.94/763,775.37 = 311,772.93/x
  3. Step 3: Cross multiply
    553,574.94x = 763,775.37 × 311,772.93
  4. Step 4: Simplify right side
    553,574.94x = 238,124,484,966.73
  5. Step 5: Solve for x
    x = 238,124,484,966.73/553,574.94
  6. Step 6: Final answer
    x = 430,157.63

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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.