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Finding the Fourth Proportional to 385,360.40, 578,040.60 and 148,710.80

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Solution

The fourth proportional to 385,360.40, 578,040.60 and 148,710.80 is: 223,066.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,360.40 : 578,040.60 = 148,710.80 : x
  2. Step 2: Convert to fraction form
    385,360.40/578,040.60 = 148,710.80/x
  3. Step 3: Cross multiply
    385,360.40x = 578,040.60 × 148,710.80
  4. Step 4: Simplify right side
    385,360.40x = 85,960,880,058.48
  5. Step 5: Solve for x
    x = 85,960,880,058.48/385,360.40
  6. Step 6: Final answer
    x = 223,066.20

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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.