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Finding the Fourth Proportional to 678,123.84, 935,779.36 and 376,315.20

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Solution

The fourth proportional to 678,123.84, 935,779.36 and 376,315.20 is: 519,297.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,123.84 : 935,779.36 = 376,315.20 : x
  2. Step 2: Convert to fraction form
    678,123.84/935,779.36 = 376,315.20/x
  3. Step 3: Cross multiply
    678,123.84x = 935,779.36 × 376,315.20
  4. Step 4: Simplify right side
    678,123.84x = 352,147,997,014.27
  5. Step 5: Solve for x
    x = 352,147,997,014.27/678,123.84
  6. Step 6: Final answer
    x = 519,297.47

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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.