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Finding the Fourth Proportional to 666,413.60, 999,328.80 and 266,921.60

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Solution

The fourth proportional to 666,413.60, 999,328.80 and 266,921.60 is: 400,265.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,413.60 : 999,328.80 = 266,921.60 : x
  2. Step 2: Convert to fraction form
    666,413.60/999,328.80 = 266,921.60/x
  3. Step 3: Cross multiply
    666,413.60x = 999,328.80 × 266,921.60
  4. Step 4: Simplify right side
    666,413.60x = 266,742,442,222.08
  5. Step 5: Solve for x
    x = 266,742,442,222.08/666,413.60
  6. Step 6: Final answer
    x = 400,265.60

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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.