Home / 642,495.20-963,199.56-405,316.40

Finding the Fourth Proportional to 642,495.20, 963,199.56 and 405,316.40

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Solution

The fourth proportional to 642,495.20, 963,199.56 and 405,316.40 is: 607,631.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,495.20 : 963,199.56 = 405,316.40 : x
  2. Step 2: Convert to fraction form
    642,495.20/963,199.56 = 405,316.40/x
  3. Step 3: Cross multiply
    642,495.20x = 963,199.56 × 405,316.40
  4. Step 4: Simplify right side
    642,495.20x = 390,400,578,140.78
  5. Step 5: Solve for x
    x = 390,400,578,140.78/642,495.20
  6. Step 6: Final answer
    x = 607,631.90

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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.