Home / 280,931.26-387,686.63-153,606.86

Finding the Fourth Proportional to 280,931.26, 387,686.63 and 153,606.86

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Solution

The fourth proportional to 280,931.26, 387,686.63 and 153,606.86 is: 211,978.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,931.26 : 387,686.63 = 153,606.86 : x
  2. Step 2: Convert to fraction form
    280,931.26/387,686.63 = 153,606.86/x
  3. Step 3: Cross multiply
    280,931.26x = 387,686.63 × 153,606.86
  4. Step 4: Simplify right side
    280,931.26x = 59,551,325,898.28
  5. Step 5: Solve for x
    x = 59,551,325,898.28/280,931.26
  6. Step 6: Final answer
    x = 211,978.28

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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.