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Finding the Fourth Proportional to 572,616.60, 858,924.90 and 520,085.40

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Solution

The fourth proportional to 572,616.60, 858,924.90 and 520,085.40 is: 780,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,616.60 : 858,924.90 = 520,085.40 : x
  2. Step 2: Convert to fraction form
    572,616.60/858,924.90 = 520,085.40/x
  3. Step 3: Cross multiply
    572,616.60x = 858,924.90 × 520,085.40
  4. Step 4: Simplify right side
    572,616.60x = 446,714,300,186.46
  5. Step 5: Solve for x
    x = 446,714,300,186.46/572,616.60
  6. Step 6: Final answer
    x = 780,128.10

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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.