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Finding the Fourth Proportional to 317,420.40, 438,018.72 and 174,189.62

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Solution

The fourth proportional to 317,420.40, 438,018.72 and 174,189.62 is: 240,369.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,420.40 : 438,018.72 = 174,189.62 : x
  2. Step 2: Convert to fraction form
    317,420.40/438,018.72 = 174,189.62/x
  3. Step 3: Cross multiply
    317,420.40x = 438,018.72 × 174,189.62
  4. Step 4: Simplify right side
    317,420.40x = 76,298,314,389.69
  5. Step 5: Solve for x
    x = 76,298,314,389.69/317,420.40
  6. Step 6: Final answer
    x = 240,369.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.