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Finding the Fourth Proportional to 612,086.40, 918,129.60 and 521,544.60

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Solution

The fourth proportional to 612,086.40, 918,129.60 and 521,544.60 is: 782,316.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,086.40 : 918,129.60 = 521,544.60 : x
  2. Step 2: Convert to fraction form
    612,086.40/918,129.60 = 521,544.60/x
  3. Step 3: Cross multiply
    612,086.40x = 918,129.60 × 521,544.60
  4. Step 4: Simplify right side
    612,086.40x = 478,845,534,980.16
  5. Step 5: Solve for x
    x = 478,845,534,980.16/612,086.40
  6. Step 6: Final answer
    x = 782,316.90

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Similar ratio
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1.5x scale

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.