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Finding the Fourth Proportional to 520,038.70, 778,502.85 and 309,568.30

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Solution

The fourth proportional to 520,038.70, 778,502.85 and 309,568.30 is: 463,426.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,038.70 : 778,502.85 = 309,568.30 : x
  2. Step 2: Convert to fraction form
    520,038.70/778,502.85 = 309,568.30/x
  3. Step 3: Cross multiply
    520,038.70x = 778,502.85 × 309,568.30
  4. Step 4: Simplify right side
    520,038.70x = 240,999,803,819.66
  5. Step 5: Solve for x
    x = 240,999,803,819.66/520,038.70
  6. Step 6: Final answer
    x = 463,426.67

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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.