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Finding the Fourth Proportional to 553,360.32, 763,629.12 and 311,643.36

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Solution

The fourth proportional to 553,360.32, 763,629.12 and 311,643.36 is: 430,063.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,360.32 : 763,629.12 = 311,643.36 : x
  2. Step 2: Convert to fraction form
    553,360.32/763,629.12 = 311,643.36/x
  3. Step 3: Cross multiply
    553,360.32x = 763,629.12 × 311,643.36
  4. Step 4: Simplify right side
    553,360.32x = 237,979,944,750.64
  5. Step 5: Solve for x
    x = 237,979,944,750.64/553,360.32
  6. Step 6: Final answer
    x = 430,063.26

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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.