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Finding the Fourth Proportional to 539,090.40, 808,635.60 and 478,437.60

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Solution

The fourth proportional to 539,090.40, 808,635.60 and 478,437.60 is: 717,656.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,090.40 : 808,635.60 = 478,437.60 : x
  2. Step 2: Convert to fraction form
    539,090.40/808,635.60 = 478,437.60/x
  3. Step 3: Cross multiply
    539,090.40x = 808,635.60 × 478,437.60
  4. Step 4: Simplify right side
    539,090.40x = 386,881,675,738.56
  5. Step 5: Solve for x
    x = 386,881,675,738.56/539,090.40
  6. Step 6: Final answer
    x = 717,656.40

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Similar ratio
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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.