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Finding the Fourth Proportional to 638,693.10, 957,225.60 and 339,317.10

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Solution

The fourth proportional to 638,693.10, 957,225.60 and 339,317.10 is: 508,543.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,693.10 : 957,225.60 = 339,317.10 : x
  2. Step 2: Convert to fraction form
    638,693.10/957,225.60 = 339,317.10/x
  3. Step 3: Cross multiply
    638,693.10x = 957,225.60 × 339,317.10
  4. Step 4: Simplify right side
    638,693.10x = 324,803,014,637.76
  5. Step 5: Solve for x
    x = 324,803,014,637.76/638,693.10
  6. Step 6: Final answer
    x = 508,543.17

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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.