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Finding the Fourth Proportional to 620,415.30, 869,762.40 and 620,415.30

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Solution

The fourth proportional to 620,415.30, 869,762.40 and 620,415.30 is: 869,762.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,415.30 : 869,762.40 = 620,415.30 : x
  2. Step 2: Convert to fraction form
    620,415.30/869,762.40 = 620,415.30/x
  3. Step 3: Cross multiply
    620,415.30x = 869,762.40 × 620,415.30
  4. Step 4: Simplify right side
    620,415.30x = 539,613,900,324.72
  5. Step 5: Solve for x
    x = 539,613,900,324.72/620,415.30
  6. Step 6: Final answer
    x = 869,762.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.