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Finding the Fourth Proportional to 280,363.31, 386,900.25 and 153,039.01

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Solution

The fourth proportional to 280,363.31, 386,900.25 and 153,039.01 is: 211,193.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,363.31 : 386,900.25 = 153,039.01 : x
  2. Step 2: Convert to fraction form
    280,363.31/386,900.25 = 153,039.01/x
  3. Step 3: Cross multiply
    280,363.31x = 386,900.25 × 153,039.01
  4. Step 4: Simplify right side
    280,363.31x = 59,210,829,294.25
  5. Step 5: Solve for x
    x = 59,210,829,294.25/280,363.31
  6. Step 6: Final answer
    x = 211,193.22

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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.