Home / 645,465.48-890,729.70-358,979.40

Finding the Fourth Proportional to 645,465.48, 890,729.70 and 358,979.40

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Solution

The fourth proportional to 645,465.48, 890,729.70 and 358,979.40 is: 495,384.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,465.48 : 890,729.70 = 358,979.40 : x
  2. Step 2: Convert to fraction form
    645,465.48/890,729.70 = 358,979.40/x
  3. Step 3: Cross multiply
    645,465.48x = 890,729.70 × 358,979.40
  4. Step 4: Simplify right side
    645,465.48x = 319,753,613,268.18
  5. Step 5: Solve for x
    x = 319,753,613,268.18/645,465.48
  6. Step 6: Final answer
    x = 495,384.53

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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.