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Finding the Fourth Proportional to 640,565.40, 960,041.70 and 325,109.40

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Solution

The fourth proportional to 640,565.40, 960,041.70 and 325,109.40 is: 487,254.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,565.40 : 960,041.70 = 325,109.40 : x
  2. Step 2: Convert to fraction form
    640,565.40/960,041.70 = 325,109.40/x
  3. Step 3: Cross multiply
    640,565.40x = 960,041.70 × 325,109.40
  4. Step 4: Simplify right side
    640,565.40x = 312,118,581,061.98
  5. Step 5: Solve for x
    x = 312,118,581,061.98/640,565.40
  6. Step 6: Final answer
    x = 487,254.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.