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Finding the Fourth Proportional to 260,547.60, 390,821.40 and 73,559.10

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Solution

The fourth proportional to 260,547.60, 390,821.40 and 73,559.10 is: 110,338.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,547.60 : 390,821.40 = 73,559.10 : x
  2. Step 2: Convert to fraction form
    260,547.60/390,821.40 = 73,559.10/x
  3. Step 3: Cross multiply
    260,547.60x = 390,821.40 × 73,559.10
  4. Step 4: Simplify right side
    260,547.60x = 28,748,470,444.74
  5. Step 5: Solve for x
    x = 28,748,470,444.74/260,547.60
  6. Step 6: Final answer
    x = 110,338.65

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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.