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Finding the Fourth Proportional to 645,345.60, 968,018.40 and 620,851.20

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Solution

The fourth proportional to 645,345.60, 968,018.40 and 620,851.20 is: 931,276.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,345.60 : 968,018.40 = 620,851.20 : x
  2. Step 2: Convert to fraction form
    645,345.60/968,018.40 = 620,851.20/x
  3. Step 3: Cross multiply
    645,345.60x = 968,018.40 × 620,851.20
  4. Step 4: Simplify right side
    645,345.60x = 600,995,385,262.08
  5. Step 5: Solve for x
    x = 600,995,385,262.08/645,345.60
  6. Step 6: Final answer
    x = 931,276.80

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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.