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Finding the Fourth Proportional to 639,413.53, 956,206.80 and 477,420.90

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Solution

The fourth proportional to 639,413.53, 956,206.80 and 477,420.90 is: 713,955.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,413.53 : 956,206.80 = 477,420.90 : x
  2. Step 2: Convert to fraction form
    639,413.53/956,206.80 = 477,420.90/x
  3. Step 3: Cross multiply
    639,413.53x = 956,206.80 × 477,420.90
  4. Step 4: Simplify right side
    639,413.53x = 456,513,116,530.45
  5. Step 5: Solve for x
    x = 456,513,116,530.45/639,413.53
  6. Step 6: Final answer
    x = 713,955.98

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1.5x scale

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.