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Finding the Fourth Proportional to 691,521.90, 953,888.97 and 538,317.60

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Solution

The fourth proportional to 691,521.90, 953,888.97 and 538,317.60 is: 742,558.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,521.90 : 953,888.97 = 538,317.60 : x
  2. Step 2: Convert to fraction form
    691,521.90/953,888.97 = 538,317.60/x
  3. Step 3: Cross multiply
    691,521.90x = 953,888.97 × 538,317.60
  4. Step 4: Simplify right side
    691,521.90x = 513,495,220,996.87
  5. Step 5: Solve for x
    x = 513,495,220,996.87/691,521.90
  6. Step 6: Final answer
    x = 742,558.15

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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.