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Finding the Fourth Proportional to 760.03, 1,048.71 and 479.78

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Solution

The fourth proportional to 760.03, 1,048.71 and 479.78 is: 662.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.03 : 1,048.71 = 479.78 : x
  2. Step 2: Convert to fraction form
    760.03/1,048.71 = 479.78/x
  3. Step 3: Cross multiply
    760.03x = 1,048.71 × 479.78
  4. Step 4: Simplify right side
    760.03x = 503,150.08
  5. Step 5: Solve for x
    x = 503,150.08/760.03
  6. Step 6: Final answer
    x = 662.01

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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.