Home / 687,448.32-948,466.08-400,765.50

Finding the Fourth Proportional to 687,448.32, 948,466.08 and 400,765.50

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Solution

The fourth proportional to 687,448.32, 948,466.08 and 400,765.50 is: 552,932.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,448.32 : 948,466.08 = 400,765.50 : x
  2. Step 2: Convert to fraction form
    687,448.32/948,466.08 = 400,765.50/x
  3. Step 3: Cross multiply
    687,448.32x = 948,466.08 × 400,765.50
  4. Step 4: Simplify right side
    687,448.32x = 380,112,482,784.24
  5. Step 5: Solve for x
    x = 380,112,482,784.24/687,448.32
  6. Step 6: Final answer
    x = 552,932.45

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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.