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Finding the Fourth Proportional to 317,600.16, 438,309.48 and 209,985.16

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Solution

The fourth proportional to 317,600.16, 438,309.48 and 209,985.16 is: 289,793.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,600.16 : 438,309.48 = 209,985.16 : x
  2. Step 2: Convert to fraction form
    317,600.16/438,309.48 = 209,985.16/x
  3. Step 3: Cross multiply
    317,600.16x = 438,309.48 × 209,985.16
  4. Step 4: Simplify right side
    317,600.16x = 92,038,486,287.32
  5. Step 5: Solve for x
    x = 92,038,486,287.32/317,600.16
  6. Step 6: Final answer
    x = 289,793.58

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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.