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Finding the Fourth Proportional to 553,619.10, 830,428.65 and 453,891.90

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Solution

The fourth proportional to 553,619.10, 830,428.65 and 453,891.90 is: 680,837.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,619.10 : 830,428.65 = 453,891.90 : x
  2. Step 2: Convert to fraction form
    553,619.10/830,428.65 = 453,891.90/x
  3. Step 3: Cross multiply
    553,619.10x = 830,428.65 × 453,891.90
  4. Step 4: Simplify right side
    553,619.10x = 376,924,837,762.94
  5. Step 5: Solve for x
    x = 376,924,837,762.94/553,619.10
  6. Step 6: Final answer
    x = 680,837.85

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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.