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Finding the Fourth Proportional to 387,052.70, 534,158.98 and 291,407.90

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Solution

The fourth proportional to 387,052.70, 534,158.98 and 291,407.90 is: 402,162.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,052.70 : 534,158.98 = 291,407.90 : x
  2. Step 2: Convert to fraction form
    387,052.70/534,158.98 = 291,407.90/x
  3. Step 3: Cross multiply
    387,052.70x = 534,158.98 × 291,407.90
  4. Step 4: Simplify right side
    387,052.70x = 155,658,146,627.94
  5. Step 5: Solve for x
    x = 155,658,146,627.94/387,052.70
  6. Step 6: Final answer
    x = 402,162.67

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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.