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Finding the Fourth Proportional to 586,901, 809,923.38 and 318,629

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Solution

The fourth proportional to 586,901, 809,923.38 and 318,629 is: 439,708.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,901 : 809,923.38 = 318,629 : x
  2. Step 2: Convert to fraction form
    586,901/809,923.38 = 318,629/x
  3. Step 3: Cross multiply
    586,901x = 809,923.38 × 318,629
  4. Step 4: Simplify right side
    586,901x = 258,065,076,646.02
  5. Step 5: Solve for x
    x = 258,065,076,646.02/586,901
  6. Step 6: Final answer
    x = 439,708.02

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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.