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Finding the Fourth Proportional to 520,015.70, 778,468.35 and 309,545.30

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Solution

The fourth proportional to 520,015.70, 778,468.35 and 309,545.30 is: 463,392.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,015.70 : 778,468.35 = 309,545.30 : x
  2. Step 2: Convert to fraction form
    520,015.70/778,468.35 = 309,545.30/x
  3. Step 3: Cross multiply
    520,015.70x = 778,468.35 × 309,545.30
  4. Step 4: Simplify right side
    520,015.70x = 240,971,218,941.26
  5. Step 5: Solve for x
    x = 240,971,218,941.26/520,015.70
  6. Step 6: Final answer
    x = 463,392.20

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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.