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Finding the Fourth Proportional to 830,690.40, 1,245,574.80 and 331,490.40

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Solution

The fourth proportional to 830,690.40, 1,245,574.80 and 331,490.40 is: 497,051.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,690.40 : 1,245,574.80 = 331,490.40 : x
  2. Step 2: Convert to fraction form
    830,690.40/1,245,574.80 = 331,490.40/x
  3. Step 3: Cross multiply
    830,690.40x = 1,245,574.80 × 331,490.40
  4. Step 4: Simplify right side
    830,690.40x = 412,896,088,681.92
  5. Step 5: Solve for x
    x = 412,896,088,681.92/830,690.40
  6. Step 6: Final answer
    x = 497,051.72

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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.