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Finding the Fourth Proportional to 495,956.80, 741,966.90 and 430,128.10

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Solution

The fourth proportional to 495,956.80, 741,966.90 and 430,128.10 is: 643,485.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,956.80 : 741,966.90 = 430,128.10 : x
  2. Step 2: Convert to fraction form
    495,956.80/741,966.90 = 430,128.10/x
  3. Step 3: Cross multiply
    495,956.80x = 741,966.90 × 430,128.10
  4. Step 4: Simplify right side
    495,956.80x = 319,140,812,959.89
  5. Step 5: Solve for x
    x = 319,140,812,959.89/495,956.80
  6. Step 6: Final answer
    x = 643,485.10

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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.