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Finding the Fourth Proportional to 720,762.58, 994,646.82 and 398,486.26

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Solution

The fourth proportional to 720,762.58, 994,646.82 and 398,486.26 is: 549,907.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,762.58 : 994,646.82 = 398,486.26 : x
  2. Step 2: Convert to fraction form
    720,762.58/994,646.82 = 398,486.26/x
  3. Step 3: Cross multiply
    720,762.58x = 994,646.82 × 398,486.26
  4. Step 4: Simplify right side
    720,762.58x = 396,353,091,322.69
  5. Step 5: Solve for x
    x = 396,353,091,322.69/720,762.58
  6. Step 6: Final answer
    x = 549,907.98

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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.