Home / 643,901.10-888,587.02-402,323.86

Finding the Fourth Proportional to 643,901.10, 888,587.02 and 402,323.86

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Solution

The fourth proportional to 643,901.10, 888,587.02 and 402,323.86 is: 555,209.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,901.10 : 888,587.02 = 402,323.86 : x
  2. Step 2: Convert to fraction form
    643,901.10/888,587.02 = 402,323.86/x
  3. Step 3: Cross multiply
    643,901.10x = 888,587.02 × 402,323.86
  4. Step 4: Simplify right side
    643,901.10x = 357,499,759,832.30
  5. Step 5: Solve for x
    x = 357,499,759,832.30/643,901.10
  6. Step 6: Final answer
    x = 555,209.11

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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.