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Finding the Fourth Proportional to 487,425.60, 672,642.72 and 272,563.20

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Solution

The fourth proportional to 487,425.60, 672,642.72 and 272,563.20 is: 376,134.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,425.60 : 672,642.72 = 272,563.20 : x
  2. Step 2: Convert to fraction form
    487,425.60/672,642.72 = 272,563.20/x
  3. Step 3: Cross multiply
    487,425.60x = 672,642.72 × 272,563.20
  4. Step 4: Simplify right side
    487,425.60x = 183,337,652,219.90
  5. Step 5: Solve for x
    x = 183,337,652,219.90/487,425.60
  6. Step 6: Final answer
    x = 376,134.64

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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.