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Finding the Fourth Proportional to 1,547,721.60, 2,321,582.40 and 425,788.80

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Solution

The fourth proportional to 1,547,721.60, 2,321,582.40 and 425,788.80 is: 638,683.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547,721.60 : 2,321,582.40 = 425,788.80 : x
  2. Step 2: Convert to fraction form
    1,547,721.60/2,321,582.40 = 425,788.80/x
  3. Step 3: Cross multiply
    1,547,721.60x = 2,321,582.40 × 425,788.80
  4. Step 4: Simplify right side
    1,547,721.60x = 988,503,784,197.12
  5. Step 5: Solve for x
    x = 988,503,784,197.12/1,547,721.60
  6. Step 6: Final answer
    x = 638,683.20

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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.