Home / 864,006.40-1,296,009.60-421,638.40

Finding the Fourth Proportional to 864,006.40, 1,296,009.60 and 421,638.40

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Solution

The fourth proportional to 864,006.40, 1,296,009.60 and 421,638.40 is: 632,457.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,006.40 : 1,296,009.60 = 421,638.40 : x
  2. Step 2: Convert to fraction form
    864,006.40/1,296,009.60 = 421,638.40/x
  3. Step 3: Cross multiply
    864,006.40x = 1,296,009.60 × 421,638.40
  4. Step 4: Simplify right side
    864,006.40x = 546,447,414,128.64
  5. Step 5: Solve for x
    x = 546,447,414,128.64/864,006.40
  6. Step 6: Final answer
    x = 632,457.60

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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.