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Finding the Fourth Proportional to 520,058.20, 778,532.10 and 309,587.80

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Solution

The fourth proportional to 520,058.20, 778,532.10 and 309,587.80 is: 463,455.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,058.20 : 778,532.10 = 309,587.80 : x
  2. Step 2: Convert to fraction form
    520,058.20/778,532.10 = 309,587.80/x
  3. Step 3: Cross multiply
    520,058.20x = 778,532.10 × 309,587.80
  4. Step 4: Simplify right side
    520,058.20x = 241,024,040,068.38
  5. Step 5: Solve for x
    x = 241,024,040,068.38/520,058.20
  6. Step 6: Final answer
    x = 463,455.90

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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.