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Finding the Fourth Proportional to 387,051.70, 534,157.59 and 291,406.90

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Solution

The fourth proportional to 387,051.70, 534,157.59 and 291,406.90 is: 402,161.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,051.70 : 534,157.59 = 291,406.90 : x
  2. Step 2: Convert to fraction form
    387,051.70/534,157.59 = 291,406.90/x
  3. Step 3: Cross multiply
    387,051.70x = 534,157.59 × 291,406.90
  4. Step 4: Simplify right side
    387,051.70x = 155,657,207,413.37
  5. Step 5: Solve for x
    x = 155,657,207,413.37/387,051.70
  6. Step 6: Final answer
    x = 402,161.28

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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.