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Finding the Fourth Proportional to 716,838.06, 989,236.47 and 390,153.41

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Solution

The fourth proportional to 716,838.06, 989,236.47 and 390,153.41 is: 538,411.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,838.06 : 989,236.47 = 390,153.41 : x
  2. Step 2: Convert to fraction form
    716,838.06/989,236.47 = 390,153.41/x
  3. Step 3: Cross multiply
    716,838.06x = 989,236.47 × 390,153.41
  4. Step 4: Simplify right side
    716,838.06x = 385,953,982,066.86
  5. Step 5: Solve for x
    x = 385,953,982,066.86/716,838.06
  6. Step 6: Final answer
    x = 538,411.68

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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.