Home / 742,420.53-1,024,540.99-402,888.78

Finding the Fourth Proportional to 742,420.53, 1,024,540.99 and 402,888.78

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Solution

The fourth proportional to 742,420.53, 1,024,540.99 and 402,888.78 is: 555,986.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,420.53 : 1,024,540.99 = 402,888.78 : x
  2. Step 2: Convert to fraction form
    742,420.53/1,024,540.99 = 402,888.78/x
  3. Step 3: Cross multiply
    742,420.53x = 1,024,540.99 × 402,888.78
  4. Step 4: Simplify right side
    742,420.53x = 412,776,069,521.09
  5. Step 5: Solve for x
    x = 412,776,069,521.09/742,420.53
  6. Step 6: Final answer
    x = 555,986.87

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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.