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Finding the Fourth Proportional to 712,468.32, 983,209.42 and 390,180.66

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Solution

The fourth proportional to 712,468.32, 983,209.42 and 390,180.66 is: 538,451.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,468.32 : 983,209.42 = 390,180.66 : x
  2. Step 2: Convert to fraction form
    712,468.32/983,209.42 = 390,180.66/x
  3. Step 3: Cross multiply
    712,468.32x = 983,209.42 × 390,180.66
  4. Step 4: Simplify right side
    712,468.32x = 383,629,300,413.82
  5. Step 5: Solve for x
    x = 383,629,300,413.82/712,468.32
  6. Step 6: Final answer
    x = 538,451.03

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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.