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Finding the Fourth Proportional to 708,646.44, 977,937.81 and 386,358.87

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Solution

The fourth proportional to 708,646.44, 977,937.81 and 386,358.87 is: 533,178.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,646.44 : 977,937.81 = 386,358.87 : x
  2. Step 2: Convert to fraction form
    708,646.44/977,937.81 = 386,358.87/x
  3. Step 3: Cross multiply
    708,646.44x = 977,937.81 × 386,358.87
  4. Step 4: Simplify right side
    708,646.44x = 377,834,947,201.88
  5. Step 5: Solve for x
    x = 377,834,947,201.88/708,646.44
  6. Step 6: Final answer
    x = 533,178.36

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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.