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Finding the Fourth Proportional to 495,280.70, 742,921.05 and 318,133.70

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Solution

The fourth proportional to 495,280.70, 742,921.05 and 318,133.70 is: 477,200.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,280.70 : 742,921.05 = 318,133.70 : x
  2. Step 2: Convert to fraction form
    495,280.70/742,921.05 = 318,133.70/x
  3. Step 3: Cross multiply
    495,280.70x = 742,921.05 × 318,133.70
  4. Step 4: Simplify right side
    495,280.70x = 236,348,222,444.39
  5. Step 5: Solve for x
    x = 236,348,222,444.39/495,280.70
  6. Step 6: Final answer
    x = 477,200.55

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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.