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Finding the Fourth Proportional to 645,952.55, 891,413.45 and 400,846.12

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Solution

The fourth proportional to 645,952.55, 891,413.45 and 400,846.12 is: 553,166.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,952.55 : 891,413.45 = 400,846.12 : x
  2. Step 2: Convert to fraction form
    645,952.55/891,413.45 = 400,846.12/x
  3. Step 3: Cross multiply
    645,952.55x = 891,413.45 × 400,846.12
  4. Step 4: Simplify right side
    645,952.55x = 357,319,622,273.47
  5. Step 5: Solve for x
    x = 357,319,622,273.47/645,952.55
  6. Step 6: Final answer
    x = 553,166.98

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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.