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Finding the Fourth Proportional to 501,347.57, 691,860.78 and 286,487.12

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Solution

The fourth proportional to 501,347.57, 691,860.78 and 286,487.12 is: 395,352.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,347.57 : 691,860.78 = 286,487.12 : x
  2. Step 2: Convert to fraction form
    501,347.57/691,860.78 = 286,487.12/x
  3. Step 3: Cross multiply
    501,347.57x = 691,860.78 × 286,487.12
  4. Step 4: Simplify right side
    501,347.57x = 198,209,202,303.15
  5. Step 5: Solve for x
    x = 198,209,202,303.15/501,347.57
  6. Step 6: Final answer
    x = 395,352.87

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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.