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Finding the Fourth Proportional to 378,398.72, 524,444.30 and 371,312.84

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Solution

The fourth proportional to 378,398.72, 524,444.30 and 371,312.84 is: 514,623.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,398.72 : 524,444.30 = 371,312.84 : x
  2. Step 2: Convert to fraction form
    378,398.72/524,444.30 = 371,312.84/x
  3. Step 3: Cross multiply
    378,398.72x = 524,444.30 × 371,312.84
  4. Step 4: Simplify right side
    378,398.72x = 194,732,902,454.81
  5. Step 5: Solve for x
    x = 194,732,902,454.81/378,398.72
  6. Step 6: Final answer
    x = 514,623.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.