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Finding the Fourth Proportional to 612,821.80, 919,923.90 and 473,199.40

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Solution

The fourth proportional to 612,821.80, 919,923.90 and 473,199.40 is: 710,332.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,821.80 : 919,923.90 = 473,199.40 : x
  2. Step 2: Convert to fraction form
    612,821.80/919,923.90 = 473,199.40/x
  3. Step 3: Cross multiply
    612,821.80x = 919,923.90 × 473,199.40
  4. Step 4: Simplify right side
    612,821.80x = 435,307,437,525.66
  5. Step 5: Solve for x
    x = 435,307,437,525.66/612,821.80
  6. Step 6: Final answer
    x = 710,332.82

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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.