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Finding the Fourth Proportional to 660,365.60, 990,548.40 and 620,999.60

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Solution

The fourth proportional to 660,365.60, 990,548.40 and 620,999.60 is: 931,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,365.60 : 990,548.40 = 620,999.60 : x
  2. Step 2: Convert to fraction form
    660,365.60/990,548.40 = 620,999.60/x
  3. Step 3: Cross multiply
    660,365.60x = 990,548.40 × 620,999.60
  4. Step 4: Simplify right side
    660,365.60x = 615,130,160,180.64
  5. Step 5: Solve for x
    x = 615,130,160,180.64/660,365.60
  6. Step 6: Final answer
    x = 931,499.40

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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.