Home / 686,835.10-947,768.95-380,905.84

Finding the Fourth Proportional to 686,835.10, 947,768.95 and 380,905.84

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Solution

The fourth proportional to 686,835.10, 947,768.95 and 380,905.84 is: 525,614.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,835.10 : 947,768.95 = 380,905.84 : x
  2. Step 2: Convert to fraction form
    686,835.10/947,768.95 = 380,905.84/x
  3. Step 3: Cross multiply
    686,835.10x = 947,768.95 × 380,905.84
  4. Step 4: Simplify right side
    686,835.10x = 361,010,729,686.51
  5. Step 5: Solve for x
    x = 361,010,729,686.51/686,835.10
  6. Step 6: Final answer
    x = 525,614.86

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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.