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Finding the Fourth Proportional to 716,596.65, 988,873.72 and 389,911.00

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Solution

The fourth proportional to 716,596.65, 988,873.72 and 389,911.00 is: 538,061.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,596.65 : 988,873.72 = 389,911.00 : x
  2. Step 2: Convert to fraction form
    716,596.65/988,873.72 = 389,911.00/x
  3. Step 3: Cross multiply
    716,596.65x = 988,873.72 × 389,911.00
  4. Step 4: Simplify right side
    716,596.65x = 385,572,742,762.40
  5. Step 5: Solve for x
    x = 385,572,742,762.40/716,596.65
  6. Step 6: Final answer
    x = 538,061.05

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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.