Home / 879,640.40-1,319,287.80-288,664.40

Finding the Fourth Proportional to 879,640.40, 1,319,287.80 and 288,664.40

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Solution

The fourth proportional to 879,640.40, 1,319,287.80 and 288,664.40 is: 432,939.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,640.40 : 1,319,287.80 = 288,664.40 : x
  2. Step 2: Convert to fraction form
    879,640.40/1,319,287.80 = 288,664.40/x
  3. Step 3: Cross multiply
    879,640.40x = 1,319,287.80 × 288,664.40
  4. Step 4: Simplify right side
    879,640.40x = 380,831,421,214.32
  5. Step 5: Solve for x
    x = 380,831,421,214.32/879,640.40
  6. Step 6: Final answer
    x = 432,939.89

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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.