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Finding the Fourth Proportional to 612,356.20, 845,065.65 and 340,413.64

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Solution

The fourth proportional to 612,356.20, 845,065.65 and 340,413.64 is: 469,778.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,356.20 : 845,065.65 = 340,413.64 : x
  2. Step 2: Convert to fraction form
    612,356.20/845,065.65 = 340,413.64/x
  3. Step 3: Cross multiply
    612,356.20x = 845,065.65 × 340,413.64
  4. Step 4: Simplify right side
    612,356.20x = 287,671,873,955.47
  5. Step 5: Solve for x
    x = 287,671,873,955.47/612,356.20
  6. Step 6: Final answer
    x = 469,778.66

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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.