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Finding the Fourth Proportional to 554,411.61, 765,086.46 and 309,393.77

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Solution

The fourth proportional to 554,411.61, 765,086.46 and 309,393.77 is: 426,962.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,411.61 : 765,086.46 = 309,393.77 : x
  2. Step 2: Convert to fraction form
    554,411.61/765,086.46 = 309,393.77/x
  3. Step 3: Cross multiply
    554,411.61x = 765,086.46 × 309,393.77
  4. Step 4: Simplify right side
    554,411.61x = 236,712,980,409.92
  5. Step 5: Solve for x
    x = 236,712,980,409.92/554,411.61
  6. Step 6: Final answer
    x = 426,962.52

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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.