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Finding the Fourth Proportional to 719,671.46, 992,787.90 and 429,078.08

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Solution

The fourth proportional to 719,671.46, 992,787.90 and 429,078.08 is: 591,913.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,671.46 : 992,787.90 = 429,078.08 : x
  2. Step 2: Convert to fraction form
    719,671.46/992,787.90 = 429,078.08/x
  3. Step 3: Cross multiply
    719,671.46x = 992,787.90 × 429,078.08
  4. Step 4: Simplify right side
    719,671.46x = 425,983,525,979.23
  5. Step 5: Solve for x
    x = 425,983,525,979.23/719,671.46
  6. Step 6: Final answer
    x = 591,913.88

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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.