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Finding the Fourth Proportional to 686,130.50, 946,860.18 and 384,324.50

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Solution

The fourth proportional to 686,130.50, 946,860.18 and 384,324.50 is: 530,367.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,130.50 : 946,860.18 = 384,324.50 : x
  2. Step 2: Convert to fraction form
    686,130.50/946,860.18 = 384,324.50/x
  3. Step 3: Cross multiply
    686,130.50x = 946,860.18 × 384,324.50
  4. Step 4: Simplify right side
    686,130.50x = 363,901,565,248.41
  5. Step 5: Solve for x
    x = 363,901,565,248.41/686,130.50
  6. Step 6: Final answer
    x = 530,367.86

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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.