Home / 284,579.12-392,685-157,237.28

Finding the Fourth Proportional to 284,579.12, 392,685 and 157,237.28

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Solution

The fourth proportional to 284,579.12, 392,685 and 157,237.28 is: 216,968.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,579.12 : 392,685 = 157,237.28 : x
  2. Step 2: Convert to fraction form
    284,579.12/392,685 = 157,237.28/x
  3. Step 3: Cross multiply
    284,579.12x = 392,685 × 157,237.28
  4. Step 4: Simplify right side
    284,579.12x = 61,744,721,296.80
  5. Step 5: Solve for x
    x = 61,744,721,296.80/284,579.12
  6. Step 6: Final answer
    x = 216,968.56

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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.