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Finding the Fourth Proportional to 979,505.81, 1,351,643.86 and 549,702.90

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Solution

The fourth proportional to 979,505.81, 1,351,643.86 and 549,702.90 is: 758,548.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,505.81 : 1,351,643.86 = 549,702.90 : x
  2. Step 2: Convert to fraction form
    979,505.81/1,351,643.86 = 549,702.90/x
  3. Step 3: Cross multiply
    979,505.81x = 1,351,643.86 × 549,702.90
  4. Step 4: Simplify right side
    979,505.81x = 743,002,549,609.19
  5. Step 5: Solve for x
    x = 743,002,549,609.19/979,505.81
  6. Step 6: Final answer
    x = 758,548.38

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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.