Home / 287,824,915.40-397,198,381.78-155,665,909.80

Finding the Fourth Proportional to 287,824,915.40, 397,198,381.78 and 155,665,909.80

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Solution

The fourth proportional to 287,824,915.40, 397,198,381.78 and 155,665,909.80 is: 214,818,954.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,824,915.40 : 397,198,381.78 = 155,665,909.80 : x
  2. Step 2: Convert to fraction form
    287,824,915.40/397,198,381.78 = 155,665,909.80/x
  3. Step 3: Cross multiply
    287,824,915.40x = 397,198,381.78 × 155,665,909.80
  4. Step 4: Simplify right side
    287,824,915.40x = 61,830,247,470,871,440
  5. Step 5: Solve for x
    x = 61,830,247,470,871,440/287,824,915.40
  6. Step 6: Final answer
    x = 214,818,954.73

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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.