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Finding the Fourth Proportional to 704,389.79, 972,057.83 and 398,459.61

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Solution

The fourth proportional to 704,389.79, 972,057.83 and 398,459.61 is: 549,874.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,389.79 : 972,057.83 = 398,459.61 : x
  2. Step 2: Convert to fraction form
    704,389.79/972,057.83 = 398,459.61/x
  3. Step 3: Cross multiply
    704,389.79x = 972,057.83 × 398,459.61
  4. Step 4: Simplify right side
    704,389.79x = 387,325,781,846.95
  5. Step 5: Solve for x
    x = 387,325,781,846.95/704,389.79
  6. Step 6: Final answer
    x = 549,874.22

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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.