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Finding the Fourth Proportional to 554,558.90, 765,326.72 and 312,753.24

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Solution

The fourth proportional to 554,558.90, 765,326.72 and 312,753.24 is: 431,619.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,558.90 : 765,326.72 = 312,753.24 : x
  2. Step 2: Convert to fraction form
    554,558.90/765,326.72 = 312,753.24/x
  3. Step 3: Cross multiply
    554,558.90x = 765,326.72 × 312,753.24
  4. Step 4: Simplify right side
    554,558.90x = 239,358,409,774.81
  5. Step 5: Solve for x
    x = 239,358,409,774.81/554,558.90
  6. Step 6: Final answer
    x = 431,619.46

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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.