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Finding the Fourth Proportional to 287,615.70, 431,423.55 and 264,870.90

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Solution

The fourth proportional to 287,615.70, 431,423.55 and 264,870.90 is: 397,306.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,615.70 : 431,423.55 = 264,870.90 : x
  2. Step 2: Convert to fraction form
    287,615.70/431,423.55 = 264,870.90/x
  3. Step 3: Cross multiply
    287,615.70x = 431,423.55 × 264,870.90
  4. Step 4: Simplify right side
    287,615.70x = 114,271,543,969.70
  5. Step 5: Solve for x
    x = 114,271,543,969.70/287,615.70
  6. Step 6: Final answer
    x = 397,306.35

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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.