Home / 530,413.96-731,989.32-288,705.40

Finding the Fourth Proportional to 530,413.96, 731,989.32 and 288,705.40

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Solution

The fourth proportional to 530,413.96, 731,989.32 and 288,705.40 is: 398,423.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,413.96 : 731,989.32 = 288,705.40 : x
  2. Step 2: Convert to fraction form
    530,413.96/731,989.32 = 288,705.40/x
  3. Step 3: Cross multiply
    530,413.96x = 731,989.32 × 288,705.40
  4. Step 4: Simplify right side
    530,413.96x = 211,329,269,426.33
  5. Step 5: Solve for x
    x = 211,329,269,426.33/530,413.96
  6. Step 6: Final answer
    x = 398,423.28

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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.