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Finding the Fourth Proportional to 640,569.40, 960,047.70 and 325,113.40

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Solution

The fourth proportional to 640,569.40, 960,047.70 and 325,113.40 is: 487,260.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,569.40 : 960,047.70 = 325,113.40 : x
  2. Step 2: Convert to fraction form
    640,569.40/960,047.70 = 325,113.40/x
  3. Step 3: Cross multiply
    640,569.40x = 960,047.70 × 325,113.40
  4. Step 4: Simplify right side
    640,569.40x = 312,124,371,909.18
  5. Step 5: Solve for x
    x = 312,124,371,909.18/640,569.40
  6. Step 6: Final answer
    x = 487,260.82

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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.