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Finding the Fourth Proportional to 312,599.20, 431,386.32 and 169,362.88

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Solution

The fourth proportional to 312,599.20, 431,386.32 and 169,362.88 is: 233,720.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,599.20 : 431,386.32 = 169,362.88 : x
  2. Step 2: Convert to fraction form
    312,599.20/431,386.32 = 169,362.88/x
  3. Step 3: Cross multiply
    312,599.20x = 431,386.32 × 169,362.88
  4. Step 4: Simplify right side
    312,599.20x = 73,060,829,547.80
  5. Step 5: Solve for x
    x = 73,060,829,547.80/312,599.20
  6. Step 6: Final answer
    x = 233,720.46

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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.