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Finding the Fourth Proportional to 404,784.60, 607,176.90 and 138,521.40

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Solution

The fourth proportional to 404,784.60, 607,176.90 and 138,521.40 is: 207,782.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,784.60 : 607,176.90 = 138,521.40 : x
  2. Step 2: Convert to fraction form
    404,784.60/607,176.90 = 138,521.40/x
  3. Step 3: Cross multiply
    404,784.60x = 607,176.90 × 138,521.40
  4. Step 4: Simplify right side
    404,784.60x = 84,106,994,235.66
  5. Step 5: Solve for x
    x = 84,106,994,235.66/404,784.60
  6. Step 6: Final answer
    x = 207,782.10

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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.