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Finding the Fourth Proportional to 710,050.40, 979,314 and 455,424.80

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Solution

The fourth proportional to 710,050.40, 979,314 and 455,424.80 is: 628,129.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,050.40 : 979,314 = 455,424.80 : x
  2. Step 2: Convert to fraction form
    710,050.40/979,314 = 455,424.80/x
  3. Step 3: Cross multiply
    710,050.40x = 979,314 × 455,424.80
  4. Step 4: Simplify right side
    710,050.40x = 446,003,882,587.20
  5. Step 5: Solve for x
    x = 446,003,882,587.20/710,050.40
  6. Step 6: Final answer
    x = 628,129.89

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1.5x scale

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.