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Finding the Fourth Proportional to 648,915.40, 972,912.30 and 249,401.80

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Solution

The fourth proportional to 648,915.40, 972,912.30 and 249,401.80 is: 373,925.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,915.40 : 972,912.30 = 249,401.80 : x
  2. Step 2: Convert to fraction form
    648,915.40/972,912.30 = 249,401.80/x
  3. Step 3: Cross multiply
    648,915.40x = 972,912.30 × 249,401.80
  4. Step 4: Simplify right side
    648,915.40x = 242,646,078,862.14
  5. Step 5: Solve for x
    x = 242,646,078,862.14/648,915.40
  6. Step 6: Final answer
    x = 373,925.60

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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.