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Finding the Fourth Proportional to 518,645.18, 715,421.90 and 403,741.95

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Solution

The fourth proportional to 518,645.18, 715,421.90 and 403,741.95 is: 556,923.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,645.18 : 715,421.90 = 403,741.95 : x
  2. Step 2: Convert to fraction form
    518,645.18/715,421.90 = 403,741.95/x
  3. Step 3: Cross multiply
    518,645.18x = 715,421.90 × 403,741.95
  4. Step 4: Simplify right side
    518,645.18x = 288,845,830,960.00
  5. Step 5: Solve for x
    x = 288,845,830,960.00/518,645.18
  6. Step 6: Final answer
    x = 556,923.78

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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.