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Finding the Fourth Proportional to 385,497.60, 578,246.40 and 245,356.80

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Solution

The fourth proportional to 385,497.60, 578,246.40 and 245,356.80 is: 368,035.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,497.60 : 578,246.40 = 245,356.80 : x
  2. Step 2: Convert to fraction form
    385,497.60/578,246.40 = 245,356.80/x
  3. Step 3: Cross multiply
    385,497.60x = 578,246.40 × 245,356.80
  4. Step 4: Simplify right side
    385,497.60x = 141,876,686,315.52
  5. Step 5: Solve for x
    x = 141,876,686,315.52/385,497.60
  6. Step 6: Final answer
    x = 368,035.20

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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.