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Finding the Fourth Proportional to 520,309.40, 730,007.80 and 520,309.40

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Solution

The fourth proportional to 520,309.40, 730,007.80 and 520,309.40 is: 730,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,309.40 : 730,007.80 = 520,309.40 : x
  2. Step 2: Convert to fraction form
    520,309.40/730,007.80 = 520,309.40/x
  3. Step 3: Cross multiply
    520,309.40x = 730,007.80 × 520,309.40
  4. Step 4: Simplify right side
    520,309.40x = 379,829,920,413.32
  5. Step 5: Solve for x
    x = 379,829,920,413.32/520,309.40
  6. Step 6: Final answer
    x = 730,007.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.