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Finding the Fourth Proportional to 703,071.59, 970,238.45 and 380,781.65

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Solution

The fourth proportional to 703,071.59, 970,238.45 and 380,781.65 is: 525,478.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,071.59 : 970,238.45 = 380,781.65 : x
  2. Step 2: Convert to fraction form
    703,071.59/970,238.45 = 380,781.65/x
  3. Step 3: Cross multiply
    703,071.59x = 970,238.45 × 380,781.65
  4. Step 4: Simplify right side
    703,071.59x = 369,448,995,980.53
  5. Step 5: Solve for x
    x = 369,448,995,980.53/703,071.59
  6. Step 6: Final answer
    x = 525,478.49

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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.