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Finding the Fourth Proportional to 738.69, 1,019.48 and 424

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Solution

The fourth proportional to 738.69, 1,019.48 and 424 is: 585.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.69 : 1,019.48 = 424 : x
  2. Step 2: Convert to fraction form
    738.69/1,019.48 = 424/x
  3. Step 3: Cross multiply
    738.69x = 1,019.48 × 424
  4. Step 4: Simplify right side
    738.69x = 432,259.52
  5. Step 5: Solve for x
    x = 432,259.52/738.69
  6. Step 6: Final answer
    x = 585.17

Related Problems

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Half scale
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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.