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Finding the Fourth Proportional to 315,053.40, 472,608.90 and 128,026.20

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Solution

The fourth proportional to 315,053.40, 472,608.90 and 128,026.20 is: 192,051.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,053.40 : 472,608.90 = 128,026.20 : x
  2. Step 2: Convert to fraction form
    315,053.40/472,608.90 = 128,026.20/x
  3. Step 3: Cross multiply
    315,053.40x = 472,608.90 × 128,026.20
  4. Step 4: Simplify right side
    315,053.40x = 60,506,321,553.18
  5. Step 5: Solve for x
    x = 60,506,321,553.18/315,053.40
  6. Step 6: Final answer
    x = 192,051.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.