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Finding the Fourth Proportional to 1,399,432.83, 1,931,813.18 and 940,813.40

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Solution

The fourth proportional to 1,399,432.83, 1,931,813.18 and 940,813.40 is: 1,298,723.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,432.83 : 1,931,813.18 = 940,813.40 : x
  2. Step 2: Convert to fraction form
    1,399,432.83/1,931,813.18 = 940,813.40/x
  3. Step 3: Cross multiply
    1,399,432.83x = 1,931,813.18 × 940,813.40
  4. Step 4: Simplify right side
    1,399,432.83x = 1,817,475,733,222.18
  5. Step 5: Solve for x
    x = 1,817,475,733,222.18/1,399,432.83
  6. Step 6: Final answer
    x = 1,298,723.09

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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.