Home / 430,172.80-645,259.20-149,718.40

Finding the Fourth Proportional to 430,172.80, 645,259.20 and 149,718.40

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Solution

The fourth proportional to 430,172.80, 645,259.20 and 149,718.40 is: 224,577.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,172.80 : 645,259.20 = 149,718.40 : x
  2. Step 2: Convert to fraction form
    430,172.80/645,259.20 = 149,718.40/x
  3. Step 3: Cross multiply
    430,172.80x = 645,259.20 × 149,718.40
  4. Step 4: Simplify right side
    430,172.80x = 96,607,175,009.28
  5. Step 5: Solve for x
    x = 96,607,175,009.28/430,172.80
  6. Step 6: Final answer
    x = 224,577.60

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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.