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Finding the Fourth Proportional to 613,999.80, 920,999.70 and 560,855.70

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Solution

The fourth proportional to 613,999.80, 920,999.70 and 560,855.70 is: 841,283.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,999.80 : 920,999.70 = 560,855.70 : x
  2. Step 2: Convert to fraction form
    613,999.80/920,999.70 = 560,855.70/x
  3. Step 3: Cross multiply
    613,999.80x = 920,999.70 × 560,855.70
  4. Step 4: Simplify right side
    613,999.80x = 516,547,931,443.29
  5. Step 5: Solve for x
    x = 516,547,931,443.29/613,999.80
  6. Step 6: Final answer
    x = 841,283.55

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Similar ratio
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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.