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Finding the Fourth Proportional to 280,928, 387,687.66 and 170,547.98

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Solution

The fourth proportional to 280,928, 387,687.66 and 170,547.98 is: 235,360.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,928 : 387,687.66 = 170,547.98 : x
  2. Step 2: Convert to fraction form
    280,928/387,687.66 = 170,547.98/x
  3. Step 3: Cross multiply
    280,928x = 387,687.66 × 170,547.98
  4. Step 4: Simplify right side
    280,928x = 66,119,347,283.93
  5. Step 5: Solve for x
    x = 66,119,347,283.93/280,928
  6. Step 6: Final answer
    x = 235,360.47

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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.