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Finding the Fourth Proportional to 539,458.40, 808,496.40 and 480,015.20

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Solution

The fourth proportional to 539,458.40, 808,496.40 and 480,015.20 is: 719,407.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,458.40 : 808,496.40 = 480,015.20 : x
  2. Step 2: Convert to fraction form
    539,458.40/808,496.40 = 480,015.20/x
  3. Step 3: Cross multiply
    539,458.40x = 808,496.40 × 480,015.20
  4. Step 4: Simplify right side
    539,458.40x = 388,090,561,145.28
  5. Step 5: Solve for x
    x = 388,090,561,145.28/539,458.40
  6. Step 6: Final answer
    x = 719,407.76

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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.