Home / 686,520.18-947,453.78-380,692.45

Finding the Fourth Proportional to 686,520.18, 947,453.78 and 380,692.45

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Solution

The fourth proportional to 686,520.18, 947,453.78 and 380,692.45 is: 525,386.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,520.18 : 947,453.78 = 380,692.45 : x
  2. Step 2: Convert to fraction form
    686,520.18/947,453.78 = 380,692.45/x
  3. Step 3: Cross multiply
    686,520.18x = 947,453.78 × 380,692.45
  4. Step 4: Simplify right side
    686,520.18x = 360,688,502,906.01
  5. Step 5: Solve for x
    x = 360,688,502,906.01/686,520.18
  6. Step 6: Final answer
    x = 525,386.60

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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.