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Finding the Fourth Proportional to 1,424,324, 1,965,567.12 and 788,420

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Solution

The fourth proportional to 1,424,324, 1,965,567.12 and 788,420 is: 1,088,019.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424,324 : 1,965,567.12 = 788,420 : x
  2. Step 2: Convert to fraction form
    1,424,324/1,965,567.12 = 788,420/x
  3. Step 3: Cross multiply
    1,424,324x = 1,965,567.12 × 788,420
  4. Step 4: Simplify right side
    1,424,324x = 1,549,692,428,750.40
  5. Step 5: Solve for x
    x = 1,549,692,428,750.40/1,424,324
  6. Step 6: Final answer
    x = 1,088,019.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.