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Finding the Fourth Proportional to 553,790.40, 830,685.60 and 550,291.20

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Solution

The fourth proportional to 553,790.40, 830,685.60 and 550,291.20 is: 825,436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,790.40 : 830,685.60 = 550,291.20 : x
  2. Step 2: Convert to fraction form
    553,790.40/830,685.60 = 550,291.20/x
  3. Step 3: Cross multiply
    553,790.40x = 830,685.60 × 550,291.20
  4. Step 4: Simplify right side
    553,790.40x = 457,118,975,646.72
  5. Step 5: Solve for x
    x = 457,118,975,646.72/553,790.40
  6. Step 6: Final answer
    x = 825,436.80

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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.