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Finding the Fourth Proportional to 621,805.10, 933,254.40 and 368,769.20

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Solution

The fourth proportional to 621,805.10, 933,254.40 and 368,769.20 is: 553,478.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,805.10 : 933,254.40 = 368,769.20 : x
  2. Step 2: Convert to fraction form
    621,805.10/933,254.40 = 368,769.20/x
  3. Step 3: Cross multiply
    621,805.10x = 933,254.40 × 368,769.20
  4. Step 4: Simplify right side
    621,805.10x = 344,155,478,484.48
  5. Step 5: Solve for x
    x = 344,155,478,484.48/621,805.10
  6. Step 6: Final answer
    x = 553,478.06

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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.