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Finding the Fourth Proportional to 709,018.91, 978,925.21 and 545,384.83

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Solution

The fourth proportional to 709,018.91, 978,925.21 and 545,384.83 is: 752,999.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,018.91 : 978,925.21 = 545,384.83 : x
  2. Step 2: Convert to fraction form
    709,018.91/978,925.21 = 545,384.83/x
  3. Step 3: Cross multiply
    709,018.91x = 978,925.21 × 545,384.83
  4. Step 4: Simplify right side
    709,018.91x = 533,890,959,238.56
  5. Step 5: Solve for x
    x = 533,890,959,238.56/709,018.91
  6. Step 6: Final answer
    x = 752,999.61

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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.