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Finding the Fourth Proportional to 553,376.32, 763,651.20 and 311,659.36

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Solution

The fourth proportional to 553,376.32, 763,651.20 and 311,659.36 is: 430,085.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,376.32 : 763,651.20 = 311,659.36 : x
  2. Step 2: Convert to fraction form
    553,376.32/763,651.20 = 311,659.36/x
  3. Step 3: Cross multiply
    553,376.32x = 763,651.20 × 311,659.36
  4. Step 4: Simplify right side
    553,376.32x = 237,999,044,255.23
  5. Step 5: Solve for x
    x = 237,999,044,255.23/553,376.32
  6. Step 6: Final answer
    x = 430,085.34

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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.