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Finding the Fourth Proportional to 645,647.64, 890,463.15 and 573,103.50

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Solution

The fourth proportional to 645,647.64, 890,463.15 and 573,103.50 is: 790,411.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,647.64 : 890,463.15 = 573,103.50 : x
  2. Step 2: Convert to fraction form
    645,647.64/890,463.15 = 573,103.50/x
  3. Step 3: Cross multiply
    645,647.64x = 890,463.15 × 573,103.50
  4. Step 4: Simplify right side
    645,647.64x = 510,327,547,886.03
  5. Step 5: Solve for x
    x = 510,327,547,886.03/645,647.64
  6. Step 6: Final answer
    x = 790,411.85

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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.