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Finding the Fourth Proportional to 612,111.80, 915,575.70 and 549,385.40

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Solution

The fourth proportional to 612,111.80, 915,575.70 and 549,385.40 is: 821,751.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,111.80 : 915,575.70 = 549,385.40 : x
  2. Step 2: Convert to fraction form
    612,111.80/915,575.70 = 549,385.40/x
  3. Step 3: Cross multiply
    612,111.80x = 915,575.70 × 549,385.40
  4. Step 4: Simplify right side
    612,111.80x = 503,003,922,174.78
  5. Step 5: Solve for x
    x = 503,003,922,174.78/612,111.80
  6. Step 6: Final answer
    x = 821,751.72

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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.