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Finding the Fourth Proportional to 662,413.86, 914,250.78 and 390,466.08

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Solution

The fourth proportional to 662,413.86, 914,250.78 and 390,466.08 is: 538,913.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,413.86 : 914,250.78 = 390,466.08 : x
  2. Step 2: Convert to fraction form
    662,413.86/914,250.78 = 390,466.08/x
  3. Step 3: Cross multiply
    662,413.86x = 914,250.78 × 390,466.08
  4. Step 4: Simplify right side
    662,413.86x = 356,983,918,203.54
  5. Step 5: Solve for x
    x = 356,983,918,203.54/662,413.86
  6. Step 6: Final answer
    x = 538,913.72

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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.