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Finding the Fourth Proportional to 610,412.80, 915,619.20 and 520,211.20

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Solution

The fourth proportional to 610,412.80, 915,619.20 and 520,211.20 is: 780,316.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,412.80 : 915,619.20 = 520,211.20 : x
  2. Step 2: Convert to fraction form
    610,412.80/915,619.20 = 520,211.20/x
  3. Step 3: Cross multiply
    610,412.80x = 915,619.20 × 520,211.20
  4. Step 4: Simplify right side
    610,412.80x = 476,315,362,775.04
  5. Step 5: Solve for x
    x = 476,315,362,775.04/610,412.80
  6. Step 6: Final answer
    x = 780,316.80

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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.