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Finding the Fourth Proportional to 288,282.77, 432,424.14 and 85,881.93

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Solution

The fourth proportional to 288,282.77, 432,424.14 and 85,881.93 is: 128,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,282.77 : 432,424.14 = 85,881.93 : x
  2. Step 2: Convert to fraction form
    288,282.77/432,424.14 = 85,881.93/x
  3. Step 3: Cross multiply
    288,282.77x = 432,424.14 × 85,881.93
  4. Step 4: Simplify right side
    288,282.77x = 37,137,420,999.78
  5. Step 5: Solve for x
    x = 37,137,420,999.78/288,282.77
  6. Step 6: Final answer
    x = 128,822.90

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1.5x scale

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.