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Finding the Fourth Proportional to 456,642.18, 630,419.58 and 275,400.21

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Solution

The fourth proportional to 456,642.18, 630,419.58 and 275,400.21 is: 380,205.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,642.18 : 630,419.58 = 275,400.21 : x
  2. Step 2: Convert to fraction form
    456,642.18/630,419.58 = 275,400.21/x
  3. Step 3: Cross multiply
    456,642.18x = 630,419.58 × 275,400.21
  4. Step 4: Simplify right side
    456,642.18x = 173,617,684,720.11
  5. Step 5: Solve for x
    x = 173,617,684,720.11/456,642.18
  6. Step 6: Final answer
    x = 380,205.10

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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.