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Finding the Fourth Proportional to 549,705.57, 758,615.43 and 307,990.12

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Solution

The fourth proportional to 549,705.57, 758,615.43 and 307,990.12 is: 425,038.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,705.57 : 758,615.43 = 307,990.12 : x
  2. Step 2: Convert to fraction form
    549,705.57/758,615.43 = 307,990.12/x
  3. Step 3: Cross multiply
    549,705.57x = 758,615.43 × 307,990.12
  4. Step 4: Simplify right side
    549,705.57x = 233,646,057,319.55
  5. Step 5: Solve for x
    x = 233,646,057,319.55/549,705.57
  6. Step 6: Final answer
    x = 425,038.55

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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.