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Finding the Fourth Proportional to 978,075.75, 1,349,748.18 and 570,459.05

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Solution

The fourth proportional to 978,075.75, 1,349,748.18 and 570,459.05 is: 787,235.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,075.75 : 1,349,748.18 = 570,459.05 : x
  2. Step 2: Convert to fraction form
    978,075.75/1,349,748.18 = 570,459.05/x
  3. Step 3: Cross multiply
    978,075.75x = 1,349,748.18 × 570,459.05
  4. Step 4: Simplify right side
    978,075.75x = 769,976,057,753.29
  5. Step 5: Solve for x
    x = 769,976,057,753.29/978,075.75
  6. Step 6: Final answer
    x = 787,235.61

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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.