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Finding the Fourth Proportional to 554,420.84, 765,069.32 and 312,688.98

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Solution

The fourth proportional to 554,420.84, 765,069.32 and 312,688.98 is: 431,493.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,420.84 : 765,069.32 = 312,688.98 : x
  2. Step 2: Convert to fraction form
    554,420.84/765,069.32 = 312,688.98/x
  3. Step 3: Cross multiply
    554,420.84x = 765,069.32 × 312,688.98
  4. Step 4: Simplify right side
    554,420.84x = 239,228,746,081.82
  5. Step 5: Solve for x
    x = 239,228,746,081.82/554,420.84
  6. Step 6: Final answer
    x = 431,493.07

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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.