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Finding the Fourth Proportional to 679,672.90, 1,018,342.95 and 442,893.70

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Solution

The fourth proportional to 679,672.90, 1,018,342.95 and 442,893.70 is: 663,580.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,672.90 : 1,018,342.95 = 442,893.70 : x
  2. Step 2: Convert to fraction form
    679,672.90/1,018,342.95 = 442,893.70/x
  3. Step 3: Cross multiply
    679,672.90x = 1,018,342.95 × 442,893.70
  4. Step 4: Simplify right side
    679,672.90x = 451,017,676,994.42
  5. Step 5: Solve for x
    x = 451,017,676,994.42/679,672.90
  6. Step 6: Final answer
    x = 663,580.49

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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.