Home / 686,763.06-947,731.50-380,831.88

Finding the Fourth Proportional to 686,763.06, 947,731.50 and 380,831.88

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Solution

The fourth proportional to 686,763.06, 947,731.50 and 380,831.88 is: 525,547.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,763.06 : 947,731.50 = 380,831.88 : x
  2. Step 2: Convert to fraction form
    686,763.06/947,731.50 = 380,831.88/x
  3. Step 3: Cross multiply
    686,763.06x = 947,731.50 × 380,831.88
  4. Step 4: Simplify right side
    686,763.06x = 360,926,368,880.22
  5. Step 5: Solve for x
    x = 360,926,368,880.22/686,763.06
  6. Step 6: Final answer
    x = 525,547.15

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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.