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Finding the Fourth Proportional to 676,055.25, 932,683.01 and 389,421.81

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Solution

The fourth proportional to 676,055.25, 932,683.01 and 389,421.81 is: 537,244.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,055.25 : 932,683.01 = 389,421.81 : x
  2. Step 2: Convert to fraction form
    676,055.25/932,683.01 = 389,421.81/x
  3. Step 3: Cross multiply
    676,055.25x = 932,683.01 × 389,421.81
  4. Step 4: Simplify right side
    676,055.25x = 363,207,103,963.34
  5. Step 5: Solve for x
    x = 363,207,103,963.34/676,055.25
  6. Step 6: Final answer
    x = 537,244.71

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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.