Home / 1,438,730.60-2,155,503.90-689,124.20

Finding the Fourth Proportional to 1,438,730.60, 2,155,503.90 and 689,124.20

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Solution

The fourth proportional to 1,438,730.60, 2,155,503.90 and 689,124.20 is: 1,032,444.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,730.60 : 2,155,503.90 = 689,124.20 : x
  2. Step 2: Convert to fraction form
    1,438,730.60/2,155,503.90 = 689,124.20/x
  3. Step 3: Cross multiply
    1,438,730.60x = 2,155,503.90 × 689,124.20
  4. Step 4: Simplify right side
    1,438,730.60x = 1,485,409,900,684.38
  5. Step 5: Solve for x
    x = 1,485,409,900,684.38/1,438,730.60
  6. Step 6: Final answer
    x = 1,032,444.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.