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Finding the Fourth Proportional to 669,356.80, 1,004,812.80 and 403,417.60

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Solution

The fourth proportional to 669,356.80, 1,004,812.80 and 403,417.60 is: 605,595.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,356.80 : 1,004,812.80 = 403,417.60 : x
  2. Step 2: Convert to fraction form
    669,356.80/1,004,812.80 = 403,417.60/x
  3. Step 3: Cross multiply
    669,356.80x = 1,004,812.80 × 403,417.60
  4. Step 4: Simplify right side
    669,356.80x = 405,359,168,225.28
  5. Step 5: Solve for x
    x = 405,359,168,225.28/669,356.80
  6. Step 6: Final answer
    x = 605,595.06

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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.