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Finding the Fourth Proportional to 287,385.63, 431,459.95 and 245,534.55

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Solution

The fourth proportional to 287,385.63, 431,459.95 and 245,534.55 is: 368,627.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,385.63 : 431,459.95 = 245,534.55 : x
  2. Step 2: Convert to fraction form
    287,385.63/431,459.95 = 245,534.55/x
  3. Step 3: Cross multiply
    287,385.63x = 431,459.95 × 245,534.55
  4. Step 4: Simplify right side
    287,385.63x = 105,938,324,666.27
  5. Step 5: Solve for x
    x = 105,938,324,666.27/287,385.63
  6. Step 6: Final answer
    x = 368,627.77

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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.