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Finding the Fourth Proportional to 685,788,568.56, 946,395,279 and 372,528,987.12

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Solution

The fourth proportional to 685,788,568.56, 946,395,279 and 372,528,987.12 is: 514,093,834.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,788,568.56 : 946,395,279 = 372,528,987.12 : x
  2. Step 2: Convert to fraction form
    685,788,568.56/946,395,279 = 372,528,987.12/x
  3. Step 3: Cross multiply
    685,788,568.56x = 946,395,279 × 372,528,987.12
  4. Step 4: Simplify right side
    685,788,568.56x = 352,559,674,701,019,840
  5. Step 5: Solve for x
    x = 352,559,674,701,019,840/685,788,568.56
  6. Step 6: Final answer
    x = 514,093,834.26

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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.