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Finding the Fourth Proportional to 397,391.61, 549,844.55 and 346,510.45

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Solution

The fourth proportional to 397,391.61, 549,844.55 and 346,510.45 is: 479,443.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,391.61 : 549,844.55 = 346,510.45 : x
  2. Step 2: Convert to fraction form
    397,391.61/549,844.55 = 346,510.45/x
  3. Step 3: Cross multiply
    397,391.61x = 549,844.55 × 346,510.45
  4. Step 4: Simplify right side
    397,391.61x = 190,526,882,450.55
  5. Step 5: Solve for x
    x = 190,526,882,450.55/397,391.61
  6. Step 6: Final answer
    x = 479,443.65

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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.