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Finding the Fourth Proportional to 724,780.80, 1,000,243.74 and 402,490.80

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Solution

The fourth proportional to 724,780.80, 1,000,243.74 and 402,490.80 is: 555,462.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,780.80 : 1,000,243.74 = 402,490.80 : x
  2. Step 2: Convert to fraction form
    724,780.80/1,000,243.74 = 402,490.80/x
  3. Step 3: Cross multiply
    724,780.80x = 1,000,243.74 × 402,490.80
  4. Step 4: Simplify right side
    724,780.80x = 402,588,903,107.59
  5. Step 5: Solve for x
    x = 402,588,903,107.59/724,780.80
  6. Step 6: Final answer
    x = 555,462.98

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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.