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Finding the Fourth Proportional to 672,752.12, 928,622.89 and 400,905.26

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Solution

The fourth proportional to 672,752.12, 928,622.89 and 400,905.26 is: 553,383.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,752.12 : 928,622.89 = 400,905.26 : x
  2. Step 2: Convert to fraction form
    672,752.12/928,622.89 = 400,905.26/x
  3. Step 3: Cross multiply
    672,752.12x = 928,622.89 × 400,905.26
  4. Step 4: Simplify right side
    672,752.12x = 372,289,801,157.40
  5. Step 5: Solve for x
    x = 372,289,801,157.40/672,752.12
  6. Step 6: Final answer
    x = 553,383.32

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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.