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Finding the Fourth Proportional to 553,316.40, 830,363.40 and 354,121.20

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Solution

The fourth proportional to 553,316.40, 830,363.40 and 354,121.20 is: 531,430.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,316.40 : 830,363.40 = 354,121.20 : x
  2. Step 2: Convert to fraction form
    553,316.40/830,363.40 = 354,121.20/x
  3. Step 3: Cross multiply
    553,316.40x = 830,363.40 × 354,121.20
  4. Step 4: Simplify right side
    553,316.40x = 294,049,283,644.08
  5. Step 5: Solve for x
    x = 294,049,283,644.08/553,316.40
  6. Step 6: Final answer
    x = 531,430.63

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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.