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Finding the Fourth Proportional to 708,315.72, 977,447.18 and 386,018.88

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Solution

The fourth proportional to 708,315.72, 977,447.18 and 386,018.88 is: 532,690.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,315.72 : 977,447.18 = 386,018.88 : x
  2. Step 2: Convert to fraction form
    708,315.72/977,447.18 = 386,018.88/x
  3. Step 3: Cross multiply
    708,315.72x = 977,447.18 × 386,018.88
  4. Step 4: Simplify right side
    708,315.72x = 377,313,065,682.76
  5. Step 5: Solve for x
    x = 377,313,065,682.76/708,315.72
  6. Step 6: Final answer
    x = 532,690.52

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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.