Home / 1,139,639.60-1,709,459.40-640,938.80

Finding the Fourth Proportional to 1,139,639.60, 1,709,459.40 and 640,938.80

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Solution

The fourth proportional to 1,139,639.60, 1,709,459.40 and 640,938.80 is: 961,408.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139,639.60 : 1,709,459.40 = 640,938.80 : x
  2. Step 2: Convert to fraction form
    1,139,639.60/1,709,459.40 = 640,938.80/x
  3. Step 3: Cross multiply
    1,139,639.60x = 1,709,459.40 × 640,938.80
  4. Step 4: Simplify right side
    1,139,639.60x = 1,095,658,856,484.72
  5. Step 5: Solve for x
    x = 1,095,658,856,484.72/1,139,639.60
  6. Step 6: Final answer
    x = 961,408.20

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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.