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Finding the Fourth Proportional to 660,309.46, 909,186.75 and 515,699.38

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Solution

The fourth proportional to 660,309.46, 909,186.75 and 515,699.38 is: 710,071.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,309.46 : 909,186.75 = 515,699.38 : x
  2. Step 2: Convert to fraction form
    660,309.46/909,186.75 = 515,699.38/x
  3. Step 3: Cross multiply
    660,309.46x = 909,186.75 × 515,699.38
  4. Step 4: Simplify right side
    660,309.46x = 468,867,043,279.22
  5. Step 5: Solve for x
    x = 468,867,043,279.22/660,309.46
  6. Step 6: Final answer
    x = 710,071.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.