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Finding the Fourth Proportional to 678,357.76, 936,086.88 and 376,528

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Solution

The fourth proportional to 678,357.76, 936,086.88 and 376,528 is: 519,582.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,357.76 : 936,086.88 = 376,528 : x
  2. Step 2: Convert to fraction form
    678,357.76/936,086.88 = 376,528/x
  3. Step 3: Cross multiply
    678,357.76x = 936,086.88 × 376,528
  4. Step 4: Simplify right side
    678,357.76x = 352,462,920,752.64
  5. Step 5: Solve for x
    x = 352,462,920,752.64/678,357.76
  6. Step 6: Final answer
    x = 519,582.65

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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.