Home / 518,929.80-778,337.10-425,272.20

Finding the Fourth Proportional to 518,929.80, 778,337.10 and 425,272.20

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Solution

The fourth proportional to 518,929.80, 778,337.10 and 425,272.20 is: 637,861.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,929.80 : 778,337.10 = 425,272.20 : x
  2. Step 2: Convert to fraction form
    518,929.80/778,337.10 = 425,272.20/x
  3. Step 3: Cross multiply
    518,929.80x = 778,337.10 × 425,272.20
  4. Step 4: Simplify right side
    518,929.80x = 331,005,130,858.62
  5. Step 5: Solve for x
    x = 331,005,130,858.62/518,929.80
  6. Step 6: Final answer
    x = 637,861.10

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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.