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Finding the Fourth Proportional to 519,430.80, 779,729.40 and 401,624.40

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Solution

The fourth proportional to 519,430.80, 779,729.40 and 401,624.40 is: 602,887.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,430.80 : 779,729.40 = 401,624.40 : x
  2. Step 2: Convert to fraction form
    519,430.80/779,729.40 = 401,624.40/x
  3. Step 3: Cross multiply
    519,430.80x = 779,729.40 × 401,624.40
  4. Step 4: Simplify right side
    519,430.80x = 313,158,352,437.36
  5. Step 5: Solve for x
    x = 313,158,352,437.36/519,430.80
  6. Step 6: Final answer
    x = 602,887.53

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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.