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Finding the Fourth Proportional to 387,700.12, 535,050.66 and 217,945.18

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Solution

The fourth proportional to 387,700.12, 535,050.66 and 217,945.18 is: 300,778.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,700.12 : 535,050.66 = 217,945.18 : x
  2. Step 2: Convert to fraction form
    387,700.12/535,050.66 = 217,945.18/x
  3. Step 3: Cross multiply
    387,700.12x = 535,050.66 × 217,945.18
  4. Step 4: Simplify right side
    387,700.12x = 116,611,712,402.82
  5. Step 5: Solve for x
    x = 116,611,712,402.82/387,700.12
  6. Step 6: Final answer
    x = 300,778.12

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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.