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Finding the Fourth Proportional to 712,575.05, 983,343.60 and 406,748.39

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Solution

The fourth proportional to 712,575.05, 983,343.60 and 406,748.39 is: 561,307.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,575.05 : 983,343.60 = 406,748.39 : x
  2. Step 2: Convert to fraction form
    712,575.05/983,343.60 = 406,748.39/x
  3. Step 3: Cross multiply
    712,575.05x = 983,343.60 × 406,748.39
  4. Step 4: Simplify right side
    712,575.05x = 399,973,421,200.09
  5. Step 5: Solve for x
    x = 399,973,421,200.09/712,575.05
  6. Step 6: Final answer
    x = 561,307.08

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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.