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Finding the Fourth Proportional to 612,798.30, 918,213.30 and 577,368.90

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Solution

The fourth proportional to 612,798.30, 918,213.30 and 577,368.90 is: 865,126.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,798.30 : 918,213.30 = 577,368.90 : x
  2. Step 2: Convert to fraction form
    612,798.30/918,213.30 = 577,368.90/x
  3. Step 3: Cross multiply
    612,798.30x = 918,213.30 × 577,368.90
  4. Step 4: Simplify right side
    612,798.30x = 530,147,802,986.37
  5. Step 5: Solve for x
    x = 530,147,802,986.37/612,798.30
  6. Step 6: Final answer
    x = 865,126.10

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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.