Home / 654,434.90-903,280.53-399,999.38

Finding the Fourth Proportional to 654,434.90, 903,280.53 and 399,999.38

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Solution

The fourth proportional to 654,434.90, 903,280.53 and 399,999.38 is: 552,097.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,434.90 : 903,280.53 = 399,999.38 : x
  2. Step 2: Convert to fraction form
    654,434.90/903,280.53 = 399,999.38/x
  3. Step 3: Cross multiply
    654,434.90x = 903,280.53 × 399,999.38
  4. Step 4: Simplify right side
    654,434.90x = 361,311,651,966.07
  5. Step 5: Solve for x
    x = 361,311,651,966.07/654,434.90
  6. Step 6: Final answer
    x = 552,097.16

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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.