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Finding the Fourth Proportional to 716,259.44, 988,417.18 and 393,969.45

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Solution

The fourth proportional to 716,259.44, 988,417.18 and 393,969.45 is: 543,666.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,259.44 : 988,417.18 = 393,969.45 : x
  2. Step 2: Convert to fraction form
    716,259.44/988,417.18 = 393,969.45/x
  3. Step 3: Cross multiply
    716,259.44x = 988,417.18 × 393,969.45
  4. Step 4: Simplify right side
    716,259.44x = 389,406,166,848.14
  5. Step 5: Solve for x
    x = 389,406,166,848.14/716,259.44
  6. Step 6: Final answer
    x = 543,666.37

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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.