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Finding the Fourth Proportional to 553,399.80, 830,099.70 and 353,945.40

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Solution

The fourth proportional to 553,399.80, 830,099.70 and 353,945.40 is: 530,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,399.80 : 830,099.70 = 353,945.40 : x
  2. Step 2: Convert to fraction form
    553,399.80/830,099.70 = 353,945.40/x
  3. Step 3: Cross multiply
    553,399.80x = 830,099.70 × 353,945.40
  4. Step 4: Simplify right side
    553,399.80x = 293,809,970,356.38
  5. Step 5: Solve for x
    x = 293,809,970,356.38/553,399.80
  6. Step 6: Final answer
    x = 530,918.10

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1.5x scale

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.