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Finding the Fourth Proportional to 358,678.40, 495,019.84 and 215,513.60

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Solution

The fourth proportional to 358,678.40, 495,019.84 and 215,513.60 is: 297,434.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,678.40 : 495,019.84 = 215,513.60 : x
  2. Step 2: Convert to fraction form
    358,678.40/495,019.84 = 215,513.60/x
  3. Step 3: Cross multiply
    358,678.40x = 495,019.84 × 215,513.60
  4. Step 4: Simplify right side
    358,678.40x = 106,683,507,789.82
  5. Step 5: Solve for x
    x = 106,683,507,789.82/358,678.40
  6. Step 6: Final answer
    x = 297,434.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.