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Finding the Fourth Proportional to 624,342,643.60, 935,506,195.80 and 521,550,144.40

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Solution

The fourth proportional to 624,342,643.60, 935,506,195.80 and 521,550,144.40 is: 781,483,367.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,342,643.60 : 935,506,195.80 = 521,550,144.40 : x
  2. Step 2: Convert to fraction form
    624,342,643.60/935,506,195.80 = 521,550,144.40/x
  3. Step 3: Cross multiply
    624,342,643.60x = 935,506,195.80 × 521,550,144.40
  4. Step 4: Simplify right side
    624,342,643.60x = 487,913,391,506,584,640
  5. Step 5: Solve for x
    x = 487,913,391,506,584,640/624,342,643.60
  6. Step 6: Final answer
    x = 781,483,367.36

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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.