Home / 687,072.70-1,030,609.05-509,925.70

Finding the Fourth Proportional to 687,072.70, 1,030,609.05 and 509,925.70

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Solution

The fourth proportional to 687,072.70, 1,030,609.05 and 509,925.70 is: 764,888.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,072.70 : 1,030,609.05 = 509,925.70 : x
  2. Step 2: Convert to fraction form
    687,072.70/1,030,609.05 = 509,925.70/x
  3. Step 3: Cross multiply
    687,072.70x = 1,030,609.05 × 509,925.70
  4. Step 4: Simplify right side
    687,072.70x = 525,534,041,247.59
  5. Step 5: Solve for x
    x = 525,534,041,247.59/687,072.70
  6. Step 6: Final answer
    x = 764,888.55

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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.