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Finding the Fourth Proportional to 280,969.46, 387,737.69 and 153,645.05

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Solution

The fourth proportional to 280,969.46, 387,737.69 and 153,645.05 is: 212,030.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,969.46 : 387,737.69 = 153,645.05 : x
  2. Step 2: Convert to fraction form
    280,969.46/387,737.69 = 153,645.05/x
  3. Step 3: Cross multiply
    280,969.46x = 387,737.69 × 153,645.05
  4. Step 4: Simplify right side
    280,969.46x = 59,573,976,968.05
  5. Step 5: Solve for x
    x = 59,573,976,968.05/280,969.46
  6. Step 6: Final answer
    x = 212,030.08

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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.