Home / 781,970.40-1,172,721.60-407,789.28

Finding the Fourth Proportional to 781,970.40, 1,172,721.60 and 407,789.28

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Solution

The fourth proportional to 781,970.40, 1,172,721.60 and 407,789.28 is: 611,561.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,970.40 : 1,172,721.60 = 407,789.28 : x
  2. Step 2: Convert to fraction form
    781,970.40/1,172,721.60 = 407,789.28/x
  3. Step 3: Cross multiply
    781,970.40x = 1,172,721.60 × 407,789.28
  4. Step 4: Simplify right side
    781,970.40x = 478,223,296,904.45
  5. Step 5: Solve for x
    x = 478,223,296,904.45/781,970.40
  6. Step 6: Final answer
    x = 611,561.89

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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.