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Finding the Fourth Proportional to 472,764.60, 705,459.56 and 421,813.35

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Solution

The fourth proportional to 472,764.60, 705,459.56 and 421,813.35 is: 629,430.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    472,764.60 : 705,459.56 = 421,813.35 : x
  2. Step 2: Convert to fraction form
    472,764.60/705,459.56 = 421,813.35/x
  3. Step 3: Cross multiply
    472,764.60x = 705,459.56 × 421,813.35
  4. Step 4: Simplify right side
    472,764.60x = 297,572,258,184.06
  5. Step 5: Solve for x
    x = 297,572,258,184.06/472,764.60
  6. Step 6: Final answer
    x = 629,430.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.