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Finding the Fourth Proportional to 708,019.20, 977,063.58 and 385,728.30

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Solution

The fourth proportional to 708,019.20, 977,063.58 and 385,728.30 is: 532,303.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,019.20 : 977,063.58 = 385,728.30 : x
  2. Step 2: Convert to fraction form
    708,019.20/977,063.58 = 385,728.30/x
  3. Step 3: Cross multiply
    708,019.20x = 977,063.58 × 385,728.30
  4. Step 4: Simplify right side
    708,019.20x = 376,881,073,705.31
  5. Step 5: Solve for x
    x = 376,881,073,705.31/708,019.20
  6. Step 6: Final answer
    x = 532,303.47

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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.