Home / 687,071.70-1,030,607.55-509,924.70

Finding the Fourth Proportional to 687,071.70, 1,030,607.55 and 509,924.70

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Solution

The fourth proportional to 687,071.70, 1,030,607.55 and 509,924.70 is: 764,887.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,071.70 : 1,030,607.55 = 509,924.70 : x
  2. Step 2: Convert to fraction form
    687,071.70/1,030,607.55 = 509,924.70/x
  3. Step 3: Cross multiply
    687,071.70x = 1,030,607.55 × 509,924.70
  4. Step 4: Simplify right side
    687,071.70x = 525,532,245,751.49
  5. Step 5: Solve for x
    x = 525,532,245,751.49/687,071.70
  6. Step 6: Final answer
    x = 764,887.05

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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.