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Finding the Fourth Proportional to 760.69, 1,049.71 and 429.15

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Solution

The fourth proportional to 760.69, 1,049.71 and 429.15 is: 592.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.69 : 1,049.71 = 429.15 : x
  2. Step 2: Convert to fraction form
    760.69/1,049.71 = 429.15/x
  3. Step 3: Cross multiply
    760.69x = 1,049.71 × 429.15
  4. Step 4: Simplify right side
    760.69x = 450,480.81
  5. Step 5: Solve for x
    x = 450,480.81/760.69
  6. Step 6: Final answer
    x = 592.20

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Double scale
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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.