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Finding the Fourth Proportional to 708,625.50, 977,903.19 and 390,673.50

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Solution

The fourth proportional to 708,625.50, 977,903.19 and 390,673.50 is: 539,129.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,625.50 : 977,903.19 = 390,673.50 : x
  2. Step 2: Convert to fraction form
    708,625.50/977,903.19 = 390,673.50/x
  3. Step 3: Cross multiply
    708,625.50x = 977,903.19 × 390,673.50
  4. Step 4: Simplify right side
    708,625.50x = 382,040,861,898.47
  5. Step 5: Solve for x
    x = 382,040,861,898.47/708,625.50
  6. Step 6: Final answer
    x = 539,129.43

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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.