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Finding the Fourth Proportional to 425,509.49, 638,319.57 and 155,595.60

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Solution

The fourth proportional to 425,509.49, 638,319.57 and 155,595.60 is: 233,413.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,509.49 : 638,319.57 = 155,595.60 : x
  2. Step 2: Convert to fraction form
    425,509.49/638,319.57 = 155,595.60/x
  3. Step 3: Cross multiply
    425,509.49x = 638,319.57 × 155,595.60
  4. Step 4: Simplify right side
    425,509.49x = 99,319,716,485.89
  5. Step 5: Solve for x
    x = 99,319,716,485.89/425,509.49
  6. Step 6: Final answer
    x = 233,413.63

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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.