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Finding the Fourth Proportional to 495,280.80, 742,921.20 and 121,303.80

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Solution

The fourth proportional to 495,280.80, 742,921.20 and 121,303.80 is: 181,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,280.80 : 742,921.20 = 121,303.80 : x
  2. Step 2: Convert to fraction form
    495,280.80/742,921.20 = 121,303.80/x
  3. Step 3: Cross multiply
    495,280.80x = 742,921.20 × 121,303.80
  4. Step 4: Simplify right side
    495,280.80x = 90,119,164,660.56
  5. Step 5: Solve for x
    x = 90,119,164,660.56/495,280.80
  6. Step 6: Final answer
    x = 181,955.70

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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.