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Finding the Fourth Proportional to 280,783.76, 387,475.83 and 153,460.26

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Solution

The fourth proportional to 280,783.76, 387,475.83 and 153,460.26 is: 211,772.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,783.76 : 387,475.83 = 153,460.26 : x
  2. Step 2: Convert to fraction form
    280,783.76/387,475.83 = 153,460.26/x
  3. Step 3: Cross multiply
    280,783.76x = 387,475.83 × 153,460.26
  4. Step 4: Simplify right side
    280,783.76x = 59,462,141,615.52
  5. Step 5: Solve for x
    x = 59,462,141,615.52/280,783.76
  6. Step 6: Final answer
    x = 211,772.02

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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.