Home / 685,124,435.81-945,472,421.15-371,858,714.37

Finding the Fourth Proportional to 685,124,435.81, 945,472,421.15 and 371,858,714.37

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Solution

The fourth proportional to 685,124,435.81, 945,472,421.15 and 371,858,714.37 is: 513,165,405.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,124,435.81 : 945,472,421.15 = 371,858,714.37 : x
  2. Step 2: Convert to fraction form
    685,124,435.81/945,472,421.15 = 371,858,714.37/x
  3. Step 3: Cross multiply
    685,124,435.81x = 945,472,421.15 × 371,858,714.37
  4. Step 4: Simplify right side
    685,124,435.81x = 351,582,159,001,130,176
  5. Step 5: Solve for x
    x = 351,582,159,001,130,176/685,124,435.81
  6. Step 6: Final answer
    x = 513,165,405.62

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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.