Home / 720,211.18-993,931.30-397,914.36

Finding the Fourth Proportional to 720,211.18, 993,931.30 and 397,914.36

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Solution

The fourth proportional to 720,211.18, 993,931.30 and 397,914.36 is: 549,143.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,211.18 : 993,931.30 = 397,914.36 : x
  2. Step 2: Convert to fraction form
    720,211.18/993,931.30 = 397,914.36/x
  3. Step 3: Cross multiply
    720,211.18x = 993,931.30 × 397,914.36
  4. Step 4: Simplify right side
    720,211.18x = 395,499,537,123.47
  5. Step 5: Solve for x
    x = 395,499,537,123.47/720,211.18
  6. Step 6: Final answer
    x = 549,143.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.