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Finding the Fourth Proportional to 665,637.70, 997,909.80 and 286,849.30

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Solution

The fourth proportional to 665,637.70, 997,909.80 and 286,849.30 is: 430,038.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,637.70 : 997,909.80 = 286,849.30 : x
  2. Step 2: Convert to fraction form
    665,637.70/997,909.80 = 286,849.30/x
  3. Step 3: Cross multiply
    665,637.70x = 997,909.80 × 286,849.30
  4. Step 4: Simplify right side
    665,637.70x = 286,249,727,593.14
  5. Step 5: Solve for x
    x = 286,249,727,593.14/665,637.70
  6. Step 6: Final answer
    x = 430,038.33

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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.