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Finding the Fourth Proportional to 435,643.80, 653,465.70 and 423,979.80

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Solution

The fourth proportional to 435,643.80, 653,465.70 and 423,979.80 is: 635,969.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    435,643.80 : 653,465.70 = 423,979.80 : x
  2. Step 2: Convert to fraction form
    435,643.80/653,465.70 = 423,979.80/x
  3. Step 3: Cross multiply
    435,643.80x = 653,465.70 × 423,979.80
  4. Step 4: Simplify right side
    435,643.80x = 277,056,256,792.86
  5. Step 5: Solve for x
    x = 277,056,256,792.86/435,643.80
  6. Step 6: Final answer
    x = 635,969.70

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1.5x scale

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.