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Finding the Fourth Proportional to 651,871.70, 978,244.95 and 385,349.30

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Solution

The fourth proportional to 651,871.70, 978,244.95 and 385,349.30 is: 578,282.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,871.70 : 978,244.95 = 385,349.30 : x
  2. Step 2: Convert to fraction form
    651,871.70/978,244.95 = 385,349.30/x
  3. Step 3: Cross multiply
    651,871.70x = 978,244.95 × 385,349.30
  4. Step 4: Simplify right side
    651,871.70x = 376,966,006,711.04
  5. Step 5: Solve for x
    x = 376,966,006,711.04/651,871.70
  6. Step 6: Final answer
    x = 578,282.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.