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Finding the Fourth Proportional to 630,413.76, 869,970 and 343,933.74

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Solution

The fourth proportional to 630,413.76, 869,970 and 343,933.74 is: 474,628.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,413.76 : 869,970 = 343,933.74 : x
  2. Step 2: Convert to fraction form
    630,413.76/869,970 = 343,933.74/x
  3. Step 3: Cross multiply
    630,413.76x = 869,970 × 343,933.74
  4. Step 4: Simplify right side
    630,413.76x = 299,212,035,787.80
  5. Step 5: Solve for x
    x = 299,212,035,787.80/630,413.76
  6. Step 6: Final answer
    x = 474,628.02

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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.