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Finding the Fourth Proportional to 480,547.20, 720,830.40 and 125,539.20

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Solution

The fourth proportional to 480,547.20, 720,830.40 and 125,539.20 is: 188,311.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,547.20 : 720,830.40 = 125,539.20 : x
  2. Step 2: Convert to fraction form
    480,547.20/720,830.40 = 125,539.20/x
  3. Step 3: Cross multiply
    480,547.20x = 720,830.40 × 125,539.20
  4. Step 4: Simplify right side
    480,547.20x = 90,492,471,751.68
  5. Step 5: Solve for x
    x = 90,492,471,751.68/480,547.20
  6. Step 6: Final answer
    x = 188,311.31

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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.