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Finding the Fourth Proportional to 612,058.40, 918,087.60 and 514,080.80

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Solution

The fourth proportional to 612,058.40, 918,087.60 and 514,080.80 is: 771,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,058.40 : 918,087.60 = 514,080.80 : x
  2. Step 2: Convert to fraction form
    612,058.40/918,087.60 = 514,080.80/x
  3. Step 3: Cross multiply
    612,058.40x = 918,087.60 × 514,080.80
  4. Step 4: Simplify right side
    612,058.40x = 471,971,207,878.08
  5. Step 5: Solve for x
    x = 471,971,207,878.08/612,058.40
  6. Step 6: Final answer
    x = 771,121.20

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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.