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Finding the Fourth Proportional to 612,769.80, 918,170.55 and 577,340.40

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Solution

The fourth proportional to 612,769.80, 918,170.55 and 577,340.40 is: 865,083.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,769.80 : 918,170.55 = 577,340.40 : x
  2. Step 2: Convert to fraction form
    612,769.80/918,170.55 = 577,340.40/x
  3. Step 3: Cross multiply
    612,769.80x = 918,170.55 × 577,340.40
  4. Step 4: Simplify right side
    612,769.80x = 530,096,952,605.22
  5. Step 5: Solve for x
    x = 530,096,952,605.22/612,769.80
  6. Step 6: Final answer
    x = 865,083.35

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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.