Home / 687,071.20-1,030,606.80-509,924.20

Finding the Fourth Proportional to 687,071.20, 1,030,606.80 and 509,924.20

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Solution

The fourth proportional to 687,071.20, 1,030,606.80 and 509,924.20 is: 764,886.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,071.20 : 1,030,606.80 = 509,924.20 : x
  2. Step 2: Convert to fraction form
    687,071.20/1,030,606.80 = 509,924.20/x
  3. Step 3: Cross multiply
    687,071.20x = 1,030,606.80 × 509,924.20
  4. Step 4: Simplify right side
    687,071.20x = 525,531,348,004.56
  5. Step 5: Solve for x
    x = 525,531,348,004.56/687,071.20
  6. Step 6: Final answer
    x = 764,886.30

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Double scale
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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.