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Finding the Fourth Proportional to 287,598.30, 431,397.45 and 243,311.55

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Solution

The fourth proportional to 287,598.30, 431,397.45 and 243,311.55 is: 364,967.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,598.30 : 431,397.45 = 243,311.55 : x
  2. Step 2: Convert to fraction form
    287,598.30/431,397.45 = 243,311.55/x
  3. Step 3: Cross multiply
    287,598.30x = 431,397.45 × 243,311.55
  4. Step 4: Simplify right side
    287,598.30x = 104,963,982,225.55
  5. Step 5: Solve for x
    x = 104,963,982,225.55/287,598.30
  6. Step 6: Final answer
    x = 364,967.33

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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.