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Finding the Fourth Proportional to 550,356.90, 825,535.35 and 390,924.60

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Solution

The fourth proportional to 550,356.90, 825,535.35 and 390,924.60 is: 586,386.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,356.90 : 825,535.35 = 390,924.60 : x
  2. Step 2: Convert to fraction form
    550,356.90/825,535.35 = 390,924.60/x
  3. Step 3: Cross multiply
    550,356.90x = 825,535.35 × 390,924.60
  4. Step 4: Simplify right side
    550,356.90x = 322,722,076,484.61
  5. Step 5: Solve for x
    x = 322,722,076,484.61/550,356.90
  6. Step 6: Final answer
    x = 586,386.90

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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.